MOTOBRICK.COM

TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => Project Classic Motobricks => Topic started by: jay1622 on August 03, 2015, 02:22:00 PM

Title: ***FINISHED***: Father & Son 1988 K75S Rebuild
Post by: jay1622 on August 03, 2015, 02:22:00 PM
Good afternoon everyone. I am hoping to pick your brains and get some thoughts and/or advice as to what you think I am seeing and what some of the causes/remedies may be.

I managed to get a little bit deeper into the bike yesterday and stumbled onto a few things that I will want to address. When I took off the lower faring, both the front and the rear of the engine had significant dirt residue. There is no smell to it so I could not figure out if it is gear oil, coolant, or oil. I'm ruling out fork oil for now due to the fact that the seals appear to be in great condition, the fork tubes look great, and there wasn't any residue on the front of the fairings.  My initial guess is I have a coolant leak upfront and a gear oil leak in the back. I hope that's not the case, but considering where the paint has come off and how, that's what I'm thinking so far. Thoughts?  Recommendations? Clutch nut perhaps?

Worst case scenario, I will just replace the seal of whatever leaks I may find as I go; just hoping it's nothing significant when I get there.

Around the electrical wiring harnesses, it looks more like friction tape, as opposed to electrical tape. Does anybody know if this is true?

For the splines, I have and have been using the Honda Moly 60 for the splines on my RT. I will assume I can clean off the old crud and use the Molly 60 in its place? I've seen in places that I can, but I wanted to hear it from you guys whether or not there is a better option out there.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: jay1622 on August 03, 2015, 07:30:29 PM
Also...

Is there any way to tell if I have the 12mm or the 13mm rear brake master cylinder? Yes, I know measure... But where? Are they universal?
Title: Re: Father & Son 1988 K75S Rebuild
Post by: Chaos on August 03, 2015, 09:20:56 PM
Also...

Is there any way to tell if I have the 12mm or the 13mm rear brake master cylinder? Yes, I know measure... But where? Are they universal?

13mm for non-abs up to oct,1988, 12 mm for abs bikes and non abs 10/88 and later
Title: Re: Father & Son 1988 K75S Rebuild
Post by: K75RT Keith on August 04, 2015, 11:07:40 AM
"Around the electrical wiring harnesses, it looks more like friction tape, as opposed to electrical tape. Does anybody know if this is true?"  Yes they used what appears to be friction tape. 

"For the splines, I have and have been using the Honda Moly 60 for the splines on my RT. I will assume I can clean off the old crud and use the Molly 60 in its place? I've seen in places that I can, but I wanted to hear it from you guys whether or not there is a better option out there."    Honda Moly60 is fine.
* * * * Be aware that Honda is discontinuing Moly 60 * * * . So get it while you can find it. 

Guard Dog makes a high moly lube and a paste.  The paste can be mixed in to a lower moly based lube if needed.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: jay1622 on August 22, 2015, 06:26:16 PM
Hey all, I was conducting an inventory of what I have so far, and I figured it was worth sharing the pic. Am I missing anything?

Oh, and huge props to the parts department at Motorcycles of Charlotte. They worked with me more than I could have imagined and were very patient at helping me sort all of the stuff; and this still is not all of it.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: K75RT Keith on August 22, 2015, 07:37:47 PM
Looks like you emptied the trust fund.   Only way you'll know if you got all the parts you need is to commence wrenching.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: Chaos on August 22, 2015, 08:09:05 PM
Hey all, I was conducting an inventory of what I have so far, and I figured it was worth sharing the pic. Am I missing anything?



don't forget to lube the barrel that holds the clutch cable to the hand lever.  I haven't bought that many BMW labeled plastic bags in the 28 years I've owned mine!
Title: Re: Father & Son 1988 K75S Rebuild
Post by: jay1622 on August 22, 2015, 08:25:14 PM
Thanks guys! Without sounding too much like a pitch man for the local dealership, the guys in parts really did me one solid. I hear what you're saying about the clutch cable. I have seen that time and time again in my old Yamaha Enduro bikes from the 80s. As for having all of the parts I will need? Time will tell, but I am pretty sure that this should be it with the exception of a few things. Namely, the final drive service plate I will have to fabricate to replace the seal and the clutch isolater I'll be making.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: RobP on August 24, 2015, 08:21:18 AM
Quote
As for having all of the parts I will need?

What I do appreciate is that BMW will still supply parts for these bikes that are ~30 years old, at somewhat reasonable prices.   Can't say that for other brands.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: jay1622 on December 30, 2015, 10:10:14 PM
Some updated Pics... Coming along quite nicely, or, so I hope!
Title: Re: Father & Son 1988 K75S Rebuild
Post by: F14CRAZY on December 31, 2015, 06:17:34 AM
Quote
As for having all of the parts I will need?

What I do appreciate is that BMW will still supply parts for these bikes that are ~30 years old, at somewhat reasonable prices.   Can't say that for other brands.

I wouldn't quite call BMW parts cheap but I haven't felt like I've been completely ripped off by them (yet). Nice they have things like clutch cables and discs in stock
Title: Re: Father & Son 1988 K75S Rebuild
Post by: The Mighty Gryphon on December 31, 2015, 10:23:40 AM
Thanks for the photos.  If your engine work is even half as good as the photos, that bike will be a real beauty.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: 67charger on January 02, 2016, 06:30:44 AM
After seeing pictures of that head, It seems HEMI badges would be appropriate.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: Martin on January 02, 2016, 02:01:49 PM
I've always wanted to own a Hemi I didn't realise that I've owned one for the last 17 years. :clap:
WooHoo Martin.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: Scud on January 02, 2016, 07:01:47 PM
Holy smokes - this is more like a restoration than a rebuild. FANTASTIC.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: jay1622 on February 21, 2016, 11:22:51 AM
New clutch pack went in last night. He continues to help and show interest.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: jay1622 on February 23, 2016, 04:15:11 PM
Mostly organized the garage (and my mind) today more than anything else, but I did manage to get a few things sorted. Got the rear suspension figured out, and the oil/water pump rebuilt and installed, and the air filter boxes sorted and ready for install as soon as I get some replacement fuel hose.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: sj2000 on March 11, 2016, 02:44:49 PM
WOW, two thumbs up! :2thumbup:
Title: Re: Father & Son 1988 K75S Rebuild
Post by: Quiltzig on July 12, 2016, 05:38:58 AM
Any progress to report since February?

I was enjoying following your restoration project.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: jay1622 on July 12, 2016, 09:02:56 AM
Tons of progress... Thanks for asking. ALL mechanical issues have been addressed and everything is back together. Fairings have been test-fit. Here's some progress related pics... Look to have her finished within the next few weeks.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: jay1622 on July 12, 2016, 09:05:14 AM
As of last week...
Title: Re: Father & Son 1988 K75S Rebuild
Post by: Martin on July 12, 2016, 11:17:08 AM
 :2thumbup:Looking good I could never get any of my kids interested in anything mechanical.
Regards Martin.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: Quiltzig on July 13, 2016, 06:11:47 AM
Thanks for the update. I only have daughters, and a grandson who is a whizz with computers but brings his motorbike to me to fix all the time. Glad to see the father / son bonding Taking place !
Title: Re: Father & Son 1988 K75S Rebuild
Post by: The Dude on July 17, 2016, 12:45:58 AM
You've created an hair loom...
Nice.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: jay1622 on August 04, 2016, 10:46:12 AM
Started the final phase of the rebuild. The panels were cleaned with hot soapy water. Next will be stripping, scuffing and repairing what's broken.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: jay1622 on August 04, 2016, 01:00:02 PM
Wax & grease stripped, and now scuffing.

 There is certainly a reason the stuff was left for last!
Title: Re: Father & Son 1988 K75S Rebuild
Post by: Elipten on August 04, 2016, 05:32:49 PM
Most impressive participation and work ethic of your son. 
Title: Re: Father & Son 1988 K75S Rebuild
Post by: riots100 on August 04, 2016, 06:01:06 PM
Most impressive participation and work ethic of your son.

I agree, the restoration of the bike is the 2nd most impressive thing about this thread.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: TrueAce on August 05, 2016, 12:12:49 AM
Reminds me of my boys when they were young.... "Dad, can I quit now? I'm tired of working on your stupid motorcycle!"
Title: Re: Father & Son 1988 K75S Rebuild
Post by: jay1622 on August 05, 2016, 01:22:56 PM
Reminds me of my boys when they were young.... "Dad, can I quit now? I'm tired of working on your stupid motorcycle!"

Thank you very much for the positive comments guys!

He hasn't said that yet, but I would be lying if I didn't say I have been watching him to make sure he wasn't getting bored with it. Six hours in the garage the other day and not a hint of boredom.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: Martin on August 05, 2016, 01:51:54 PM
 :clap: Good on you Jay, you are teaching him  skills that will serve him the rest of his life. He is still young but does he have any idea what he wants to do in life.
Congratulations Martin.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: TrueAce on August 05, 2016, 02:35:03 PM
My boys would get bored, but giving them a break would always get them interested again. Now is his reward to.own the bike at 17?
Title: Re: Father & Son 1988 K75S Rebuild
Post by: jay1622 on August 05, 2016, 02:46:17 PM
:clap: Good on you Jay, you are teaching him  skills that will serve him the rest of his life. He is still young but does he have any idea what he wants to do in life.
Congratulations Martin.

He's a rising ninth-grader and starts the week after next. He loves the mechanical aspects of things, but he digs the computer aspects as well. He just finished a year-long java coding program for youths, which he enjoyed; he was able to create mods for a video game he plays online... Go figure. Based on his input, we are pursuing a program here in our area called Apprenticeship 2000. It is a 501c3 program that awards AAS degrees out of high school with leans toward CNC machinists, tool & die making, electronics tecs and other stuff. The very-loosely planned idea is for him to finish his 4-year while he establishes himself at his trade, and then explore military options or steam-based turbine applications (coal, nuclear and so on). That's what he said yesterday, and it really hasn't changed much in the last year or so. We shall see! Thanks for asking; it's a great question, and one we explore monthly here at home.

http://apprenticeship2000.com/zwp/

http://www.youthdigital.com/
Title: Re: Father & Son 1988 K75S Rebuild
Post by: The Dude on August 05, 2016, 04:31:13 PM
Good on ya for providing the right environment.
The real skill to be acquired is in fact the tenacity to see things through.The other skills are just the carriers for that.
All the best.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: TrueAce on August 05, 2016, 05:59:38 PM
Very impressive, detailed plan! Outstanding at his age...........(think I wanted to be a race car driver).
Title: Re: Father & Son 1988 K75S Rebuild
Post by: Elipten on August 05, 2016, 11:25:21 PM
Good lord my son is the same age and he would not know about those jobs or the computer programming.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: jay1622 on August 25, 2016, 10:51:16 PM
Hit everything with a wet 400 today. Hoping to catch what I missed and the tighter spots tomorrow. Might just get to the filler too.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: The Dude on August 26, 2016, 12:20:47 AM
Fantastic,you're so close to the finnish line,now.No mention of what color your going for.Red,again? :popcorm
Title: Re: Father & Son 1988 K75S Rebuild
Post by: jay1622 on August 26, 2016, 09:18:50 AM
We have probably gone back and forth well over a dozen times now regarding the color. From the start of the project, the idea was to keep the bike as close to OEM and original as possible. As such, we will be sticking with the factory red and putting a nice coat of clear over it.

In the meantime, I had every intention of getting to more sanding and filling today; however, life does happen and it just ain't going to happen. Next week perhaps?  :dunno2:
Title: Re: Father & Son 1988 K75S Rebuild
Post by: K1300S on August 26, 2016, 11:33:03 AM
and then explore military options .


I am totally biased as I have served for 35+ years and counting, but...if I was to start over, i would do it again!

www.gocoastguard.com
http://uscga.edu/


keep the best Military Service in mind for him!

:-)

Title: Re: Father & Son 1988 K75S Rebuild
Post by: jay1622 on August 31, 2016, 09:50:53 PM
Organized, cleaned and tested the painting stuff. Closer and closer by the day!
Title: Re: Father & Son 1988 K75S Rebuild
Post by: The Mighty Gryphon on September 01, 2016, 07:57:24 PM
Boy, I sure hope that isn't a Harbor Freight gun.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: jay1622 on September 01, 2016, 08:33:31 PM
Actually, it is. I have already torn through it and rebuilt it my way. I cleaned it where it needed it and removed all of the residual glue and thread dope they use to assemble it. Much better now.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: TrueAce on September 01, 2016, 08:52:10 PM
That's intense.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: jay1622 on September 01, 2016, 10:04:03 PM
Got the plastics rack done.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: TrueAce on September 01, 2016, 10:07:54 PM
Wow! Impressive paint rack! I think that detailed attention you first displayed with the parts purchase at the beginning and the meticulous attention through the build are how you approach everything! Good job!
Title: Re: Father & Son 1988 K75S Rebuild
Post by: The Mighty Gryphon on September 02, 2016, 10:59:39 AM
Wow! that is one heck of a rack.  Will have to copy it for my K75RT paint project this winter.

Can you start a thread on tuning those Harbor Freight guns?   I would really like to find out how to make one shoot paint properly.  I've had two over the years, and both of them leaked all over and never atomized the paint properly.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: jay1622 on September 02, 2016, 11:56:37 AM
Wow! that is one heck of a rack.  Will have to copy it for my K75RT paint project this winter.

Can you start a thread on tuning those Harbor Freight guns?   I would really like to find out how to make one shoot paint properly.  I've had two over the years, and both of them leaked all over and never atomized the paint properly.

If you can stomach this guy's lack of focus and mono-toned/slooow explanation, he's actually spot-on. Remember, different paints call for different nozzles. If your's is a 1.4 you may need to add more reducer. And, your mixing & straining it, right? Those o-rings are crap where the bucket meets the gun, so don't be afraid to go the Teflon tape route. Temperature and humidity can be a huge factor as well in spray quality.

I know it appears to be over kill, but I run two in-line filters and driers before the gun. The gun has the ball-filter and it's own regulator as well. The supply regulators are known to develop trash, so increase and decrease the supply's regulator with an open line before you connect it to anything; this will break-free any debris in the supple regulator.

https://www.youtube.com/watch?v=eHI9qAUWDXQ
Title: Re: Father & Son 1988 K75S Rebuild
Post by: jay1622 on September 02, 2016, 11:58:38 AM
Wow! Impressive paint rack! I think that detailed attention you first displayed with the parts purchase at the beginning and the meticulous attention through the build are how you approach everything! Good job!

Thank you Sir. I don't know ya, but that means a lot.  :2thumbup:
Title: Re: Father & Son 1988 K75S Rebuild
Post by: jay1622 on September 03, 2016, 10:30:00 PM
One day behind thanks to weather, but today was very productive. Primed, dusted with guide coat, sanded (AGAIN!!!), and sealed. One last final sanding of everything tomorrow, and then base and clear!
Title: Re: Father & Son 1988 K75S Rebuild
Post by: TrueAce on September 03, 2016, 10:49:42 PM
No spray booth, but a space suit??!! :dunno2:
Title: Re: Father & Son 1988 K75S Rebuild
Post by: jay1622 on September 04, 2016, 11:41:24 AM
Finished the tank this morning along with half of the plastics. Looks amazing. That harbor freight gun is no joke with a little TLC.
Title: Re: Father & Son 1988 K75S Rebuild
Post by: jay1622 on September 04, 2016, 12:17:54 PM
No spray booth, but a space suit??!! :dunno2:

Perfect humidity, early-morning moisture, no bugs and everything got sprayed down with the hose anyway. Oh, zero wind also. I can always sand out the trash... Sanding out my lungs is a different story.  :nono
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: jay1622 on September 13, 2016, 12:23:17 AM
Just got back from the initial test ride. I'd say we are done. I'm waiting for my new plugs... At that point I'll do my final TB sync and then adjust my timing; looking to set everything to factory. No leaks, drips, dings, bangs, stinks or hisses!

To those of you who've helped...

Thank you!

I'll submit better pics this weekend, but until then, here she is!
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: Martin on September 13, 2016, 12:38:22 AM
 :2thumbup: :2thumbup: :2thumbup:Looks as good as new well done, give your son a pat on the back. What's the next project??
Regards Martin
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: Scud on September 13, 2016, 01:25:56 AM
Beautiful work. Maybe you and your son could enter the bike in a show?
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: Dennis de Vries on September 13, 2016, 02:16:12 AM
That turned out beautiful! Seeing as you've got a recent RT boxer as well, what will be the bike of choice now? Does it give the younger bike a run for its money?

Verstuurd vanaf mijn SM-G920F met Tapatalk

Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: K1300S on September 13, 2016, 05:45:40 AM
Nice!  Wish more folks would restore them like that instead of hacking them up.
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: Brad-Man on September 13, 2016, 08:01:53 AM
Beautiful!

I have never sprayed paint from a gun before but have a Dura-block gun and just might try to do a job on all the bits on my bike.
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: Laitch on September 13, 2016, 08:10:45 AM
This is an inspiring and well-documented restoration. Thanks, jay! :clap:
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: TrueAce on September 13, 2016, 09:17:47 AM
You and done a first-class job, very thorough. And excellent documentation. Congratulations.
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: Filmcamera on September 13, 2016, 10:05:49 AM
Very impressive work. It inspires me for my upcoming K100RS restore.  Congratulations to you both, if mine turns out half as good I will be very happy.
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: jay1622 on September 13, 2016, 11:34:14 AM
All right everyone! Here are the photos. Introducing, my brand-new 28-year-old motorcycle...

Thank you so much for all of your kind words. I know I am not the first, and won't be the last to do something like this, but to say this didn't take some serious patience and perseverance would be an understatement. Best of all, my son learned quite a bit and we will have this to look back on.

Cheers my Brick brethren!
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: mw074 on September 13, 2016, 11:42:41 AM
Nice work. Beautiful.
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: jaxon on September 13, 2016, 05:05:51 PM
Beautiful work. Great job. The real value is your son gained experience money can't buy. The best gift of all.
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: K1300S on September 13, 2016, 08:07:24 PM
wow!  that last round of pics are awesome!!!  really highlight the work you two accomplished!
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: jakgieger on September 13, 2016, 08:15:02 PM
beauty beyond words :bmwsmile
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: Elipten on September 17, 2016, 12:16:39 AM
Fantastic job!  You and your son should be very proud of yourselves. 
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: jay1622 on September 21, 2016, 09:32:21 PM
Again... Thank you very much for the kind words gents. As for what the next project is? Saving some $$$. Seriously.

I'm switching the side case outers out for new ones, so that will take care of those scratched up things. Any Ideas as to how I can get that burn/stain off the silencer?
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: jaxon on September 21, 2016, 09:36:54 PM
I'd leave the stain on it. It doesn't take anything from an already stellar refurb. It'll pop back up later. I used Simichrome in the past. You'll  be rubbing that in forever.
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: duckhawk on September 21, 2016, 09:50:20 PM
T'is a work of art and love. :clap:
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: The Mighty Gryphon on September 21, 2016, 11:13:39 PM
I'm switching the side case outers out for new ones, so that will take care of those scratched up things.

How bad are they scratched?  I have restored four side cases now, including one that had a 2" hole in the top front corner.  A tube of spot putty and a can of high build primer followed by some Rustoleum satin black will have them looking like new for a LOT less.  I figure a couple hours with some 600 wet or dry and another shot of satin black every couple years will keep them looking good for as long as I'll own them.
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: The Dude on September 22, 2016, 12:12:25 AM
Awsome documentation to the finish.Thanks Jay and son,there's hope for mine yet.
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: Martin on September 22, 2016, 02:55:09 AM
Side case restoration, wet and dry then cutting compound then plastic polish. I use a electric buff for the last two stages. Holes and cracks can be plastic welded.
Regards Martin.
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: jay1622 on September 22, 2016, 03:25:53 PM
I was treated to two brand-new side case outers (labeled in their boxes) for a song of a deal. I just got the OE reflectors and badges. The lock stops need to be swapped and I'll be in good shape there. It's just that darn exhaust. I want that stain gone. Never Dull? Nope. Blue Magic? Nope. Flitz? Nope. Haven't done the semichrome route. Hmm.
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: jaxon on September 22, 2016, 03:34:08 PM
From WebBikeWorld:

http://www.webbikeworld.com/r3/blue-job/blue-job-chrome-polish.htm

Blue Job Chrome Polish.

Your bike is really nice. I didn't notice it until you mentioned it. It's a chrome heat artifact even if you get rid of it it'll reappear.
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: Martin on September 22, 2016, 05:27:55 PM
Just after I got my Brick I did try Autosol metal polish. I  removed the muffler and used it in combination with the white buffing compound  ( for stainless steel) used on buffing wheels, fitted to a bench grinder.
Regards Martin.
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: Brad-Man on September 22, 2016, 09:32:06 PM
http://www.autogeekonline.net/forum/auto-detailing-101/27263-cleaning-polishing-stainless-steel.html (http://www.autogeekonline.net/forum/auto-detailing-101/27263-cleaning-polishing-stainless-steel.html)
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: jay1622 on October 28, 2016, 06:58:28 PM
That turned out beautiful! Seeing as you've got a recent RT boxer as well, what will be the bike of choice now? Does it give the younger bike a run for its money?

Verstuurd vanaf mijn SM-G920F met Tapatalk

You know, I have gone back and read this post a couple of times in the last few weeks. I just finished my first 500 miles on the rebuild and I have to say it's a total draw. My R1200RT is faster, quicker, more utilitarian and much more comfortable. The rebuild (1988 K75S) is what it is: older, slower, more rev'y, but it's smooth as silk, quiet and utterly flawless. I know this avoids your question, but they are so different between each other. Each has its own personality
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: Martin on October 28, 2016, 08:18:54 PM
 :2thumbup: So what's next??
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: jay1622 on October 29, 2016, 12:28:02 AM
:2thumbup: So what's next??

I'm going to write a story for a major national motorcycle magazine documenting the father/son aspect of the rebuild, and hope it's accepted by the editor. More to follow on that.

I managed to repair a nitrogen genetator for my son's high school auto tech. The instructor made my day when he offered his lifts and alignment rack as a token of appreciation. I've rebuilt the wheel ends on my F-150, threw in a leveling kit and dialed-in the alignment.

The wife's car is due for some service.

As much as I hate to say it, I need to focus on the house. I won't get anywhere near the pleasure and satisfaction of turning wrenches in the garage, but it does need to happen.

In five years, my youngest son will be ready. Maybe we'll do something then.
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: Martin on October 29, 2016, 01:25:49 AM
Hope I get to read it. Congratulations to both of you for an awesome project and best wishes for the future.
Regards Martin.
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: trek97 on October 29, 2016, 10:43:39 PM
Gorgeous machine.
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: rbm on October 30, 2016, 08:09:20 AM
From WebBikeWorld:

http://www.webbikeworld.com/r3/blue-job/blue-job-chrome-polish.htm

Blue Job Chrome Polish.

Your bike is really nice. I didn't notice it until you mentioned it. It's a chrome heat artifact even if you get rid of it it'll reappear.
The muffler is not chrome, it's stainless.  So, Blue Job might or might not work.  Blue Job depends on a chemical reaction with the chromium in bright chrome to remove stains.  It is not abrasive.  I used Blue Job on my chromed exhaust pipes on my Moto Guzzi and it worked as advertized.  I had to use a random orbital sander fitted with moistened Kimwipes as I couldn't apply enough hand pressure to get the job done.  The sander really made a big difference.

As for this stain, it might be better handled by removing the muffler and use a polishing regime of 1200 sandpaper followed by a large stationary buffer with stainless buffing compound.

As Jaxon rightly points out, it is a heat artifact and will most likely reappear.
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: jay1622 on January 22, 2017, 09:01:26 PM
I've put a little over a thousand miles on the bike, and I'd say she's officially broken-in. The RPMs at highway speeds freak me out (averaging 80-85 on the raceway, er, uh... Highway), but I know she's solid. And talk about smooth! Now that I know she's worthy of serious road-miles, it's time to invest a little. I'll be sending the seat to Sargeant Cycle Product's custom shop to have a make-shift World Sport mod done to the current pan. I've added a Givi tank bag, Michelin Avtivs, and am in process of mounting a permanent AMPS GPS Powered mount for my Navi V. She's actually becoming a daily rider.


The first picture is the bike in the parking garage at the airport; I have been taking it to the airport for my shorter business trips.


The other two is a rough idea of the GPS placement.
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: jc55 on January 22, 2017, 11:13:38 PM
She's gorgeous! Nicely done.
Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: jay1622 on January 31, 2017, 03:51:19 PM
Had to take the dang bike apart just to get to the electrics box. I was temped to just run the wire under the tank and wire it directly to the battery. I kept having to tell myself, "Do it right... Do it right..." Anyway, she's installed and wired-in. I also did the first regular maintenance oil change too just for good measure. It's going to take me twenty oil changes before this moly-b assembly lube cycles out of the block.


Title: Re: ***Finished*** Father & Son 1988 K75S Rebuild
Post by: jay1622 on March 24, 2017, 10:33:05 AM

Foolish me for including the word "Finished" in the Subject line a while back...

Still going. Here are the recent additions: Givi tankbag, Corbin Seat, Wilburs springs, and a TFX 132 shock.



Title: Re: Ain't ***Finished*** Yet: Father & Son 1988 K75S Rebuild
Post by: TommyT on April 07, 2017, 08:29:43 AM
Bike looks really great! :2thumbup:


I am interested in the new seat, can you take some closer pictures of it when time permits? I am just starting to ride my bike so I am still settling in to it as far as a comfortable riding position, but my initial feeling is that I would like to be a little back in the seat and the molded driver seat keeps be from sliding back. BTW I am 6' 4".


Also your tank bag, is it a tanklock type? How does the gas tank look without it? Do you really like it?


Thanks Tom.
Title: Re: Ain't ***Finished*** Yet: Father & Son 1988 K75S Rebuild
Post by: The Mighty Gryphon on April 07, 2017, 09:36:55 AM
I have a bike I'd like to park in your garage next winter!  :yes
Title: Re: Ain't ***Finished*** Yet: Father & Son 1988 K75S Rebuild
Post by: jay1622 on April 07, 2017, 11:03:09 AM
Bike looks really great! :2thumbup:


I am interested in the new seat, can you take some closer pictures of it when time permits? I am just starting to ride my bike so I am still settling in to it as far as a comfortable riding position, but my initial feeling is that I would like to be a little back in the seat and the molded driver seat keeps be from sliding back. BTW I am 6' 4".


Also your tank bag, is it a tanklock type? How does the gas tank look without it? Do you really like it?


Thanks Tom.


Good afternoon! Thank you very much for the compliment; a lot has gone into this thing. I am 6'2" tall, and had Corbin take out an inch, which allows me to sit back a little bit further in the seat. If I read your message correctly, I believe this is along the same lines of what you would like to do, yes? To tell you the truth though, I wish I would've left it stock. Just something about the riding position... If you want to sit a little bit more upright, as opposed to being hunched over, definitely go with the stock set up. I am out of the country today, but should be back tomorrow. I will see if I can't get some better pictures of the seat, and get them to you ASAP.


As far as the tank bag, it is a Givi. It has four clips that attach it to a bra that wraps around the tank. I didn't think I would like it, but I actually love it. I will take pictures of that too to show you what it looks like with the bag on the tank and off.
Title: Re: Ain't ***Finished*** Yet: Father & Son 1988 K75S Rebuild
Post by: TommyT on April 07, 2017, 12:48:49 PM
Thanks for the quick reply. Yes I was thinking what you said(about being further back) but I know I need to ride it more to see were I am at about position. I see what you are saying, further back means a longer arm reach and then probably more laid out.


The tank bag; I looked around for yours and could only find a version that uses their tank locking ring setup. I did not like the look of that or know how it would work on the K75. When the bag was not in use then you have a raised lip around the filler next sticking up an inch or so.


TT
Title: Re: Ain't ***Finished*** Yet: Father & Son 1988 K75S Rebuild
Post by: Martin on April 07, 2017, 01:23:52 PM

I've had my 75 coming up to twenty years and as I've matured (aged) I have moved my handle bars up and back. As well as adjusting your seat adjusting the bars can help.
Regards Martin.
Title: Re: Ain't ***Finished*** Yet: Father & Son 1988 K75S Rebuild
Post by: jay1622 on April 07, 2017, 02:06:30 PM
I've had my 75 coming up to twenty years and as I've matured (aged) I have moved my handle bars up and back. As well as adjusting your seat adjusting the bars can help.
Regards Martin.


+1!
Title: Re: Ain't ***Finished*** Yet: Father & Son 1988 K75S Rebuild
Post by: Dennis de Vries on April 07, 2017, 02:43:11 PM
I asked you earlier what bike you prefered now, the new steed or the older K... Jan. 23 you mentioned the K becoming a daily rider... Does that mean you starting to like it beter than your newer bike? What was it again, an R1200RT was it not?

Not that it really matters, just curious how a 30 year old design holds up next to a modern bike...

Verstuurd vanaf mijn HUAWEI CUN-L21 met Tapatalk

Title: Re: Ain't ***Finished*** Yet: Father & Son 1988 K75S Rebuild
Post by: jay1622 on April 08, 2017, 03:18:40 AM
I asked you earlier what bike you prefered now, the new steed or the older K... Jan. 23 you mentioned the K becoming a daily rider... Does that mean you starting to like it beter than your newer bike? What was it again, an R1200RT was it not?

Not that it really matters, just curious how a 30 year old design holds up next to a modern bike...

Verstuurd vanaf mijn HUAWEI CUN-L21 met Tapatalk


How it holds up, comparing it to the R1200RT? In short, it doesn't. Granted, I've got 60k miles on my RT, and maybe only 3k miles on this S, but comparing the two is like comparing an original Mustang to a late model one. The RT handles, rides, accelerates and stops far better than the S. Like much much better. HOWEVER, if you ask me which one is smoother? Which has more character? Which one gets my head to tilt when I look at it? It's the K75S every single time. The S is soo much more top heavy. That and it's longer wheelbase makes me feel like it's slower to commit to turns. The RT looks, and is bigger, but the center of gravity has always felt like it was in between my shins. I've, quite literally, ridden twistes with that bike for over twelve hours, and never felt fatigued. Admittedly, the RT is my daily rider, so that familiarity goes a long way. One week from today, I'll be venturing out with the S to a road here in the US called the Tail of the Dragon (US129). If my memory serves me correct, is 318 curves in 11 miles. Perhaps then I will have a more definitive answer. Until then, thank you for reminding me to answer this. While they are identical in so may ways... Size, weight, design and overall technological advancement have certainly separated the two. Interestingly enough, my RT is twelve years old now. I am holding out for the next re-design... 2020 perhaps? I can't wait to see what they'll have figured-out by then.
Title: Re: Ain't ***Finished*** Yet: Father & Son 1988 K75S Rebuild
Post by: Dennis de Vries on April 08, 2017, 05:58:14 AM
Thanks for answering that, i'll stick to my old trusty then, and stop lusting over the new stuf. I like a bike with a bit of character (who would've thought i'd ever say that about a K bike? [emoji12] )

Verstuurd vanaf mijn HUAWEI CUN-L21 met Tapatalk

Title: Re: Ain't ***Finished*** Yet: Father & Son 1988 K75S Rebuild
Post by: jay1622 on April 14, 2017, 03:52:15 PM
Bike looks really great! :2thumbup:


I am interested in the new seat, can you take some closer pictures of it when time permits? I am just starting to ride my bike so I am still settling in to it as far as a comfortable riding position, but my initial feeling is that I would like to be a little back in the seat and the molded driver seat keeps be from sliding back. BTW I am 6' 4".


Also your tank bag, is it a tanklock type? How does the gas tank look without it? Do you really like it?


Thanks Tom.


Took me a while to get to this, but here are some pictures. Let me know if you want anymore, or different angles.
Title: Re: Brief Clip Added/Tail of the Dragon: Father & Son 1988 K75S Rebuild
Post by: jay1622 on April 18, 2017, 12:25:54 PM
Here's a very short clip of me taking the rebuild around one of the curves on US 129, The Tail of the Dragon. She did great, but I think I may have burnt the gear box fluid up (Is this possible)? I rode HARD for seven hours straight; up and down the Dragon five times. What is that, like, a little over 3k curves? Shifts remained between 2nd and 3rd the whole ride.

Volume up... She sounds sweet, don't she?  :curvy-road

https://youtu.be/p7Yda0v2Byk
Title: Re: Brief Clip Added/Tail of the Dragon: Father & Son 1988 K75S Rebuild
Post by: Laitch on April 18, 2017, 01:05:23 PM

Volume up... She sounds sweet, don't she?  :curvy-road
I think I heard a little rattle in the engine.  :giggles
Title: Re: Brief Clip Added/Tail of the Dragon: Father & Son 1988 K75S Rebuild
Post by: Martin on April 18, 2017, 02:54:19 PM

 Looks and sounds great now what do you think of the way it handles? Apparently if you have enough guts and good tyres you can scrape the tragkorbs ( I don't). Although I think Tim got very close to scraping his crash bars.
Regards Martin.
Title: Re: Brief Clip Added/Tail of the Dragon: Father & Son 1988 K75S Rebuild
Post by: jay1622 on April 18, 2017, 09:57:32 PM
Hey there Martin! The ride was great, and the handling was much much better than I was expecting. Around my third time up, I let the tank remain low, I shed the side-bags, and I adjusted the tire pressure; the ride up to that point had sent the pressure up quite a few pounds. I lost traction on the rear wheel only a few times; most of which was induced by hard acceleration coming out of really steep turns. If I was a professional, I would say I drifted. Alas, I am not, so the best I can claim is that I saved myself from low-siding more times than I care to admit to.  :yow  I scraped the pegs on a few controlled curves under moderate power and compressed suspension, which resulted from this one section aptly named, "Gravity Cavity."
Title: Re: Brief Clip Added/Tail of the Dragon: Father & Son 1988 K75S Rebuild
Post by: trek97 on April 18, 2017, 11:34:49 PM
Bud the bike is an Awesome example.  The vid gives me confidence also. 
Taking my 87 K75 down to Red River Gorge an hour east of Lexington Kentucky.  For a 4 day weekend of riding.
Title: Re: Brief Clip Added/Tail of the Dragon: Father & Son 1988 K75S Rebuild
Post by: jay1622 on April 19, 2017, 06:13:25 AM
There ain't no darn rattle!!!  :hehehe
Title: Re: Brief Clip Added/Tail of the Dragon: Father & Son 1988 K75S Rebuild
Post by: jay1622 on April 24, 2017, 08:35:58 PM
Bud the bike is an Awesome example.  The vid gives me confidence also. 
Taking my 87 K75 down to Red River Gorge an hour east of Lexington Kentucky.  For a 4 day weekend of riding.


Thanks for the nod! Just let her rev... It took me the better part of four months getting used to the high rev-line while on the highway, but all it does is smooth-out and go. Enjoy the ride!!!
Title: Re: Brief Clip Added/Tail of the Dragon: Father & Son 1988 K75S Rebuild
Post by: Laitch on April 24, 2017, 10:00:07 PM
Although I think Tim got very close to scraping his crash bars.
His left toes would have been first.   :johnny
Title: Re: Brief Clip Added/Tail of the Dragon: Father & Son 1988 K75S Rebuild
Post by: jay1622 on April 26, 2017, 02:10:24 PM
I took advantage of one of those roadside photographers from the Dragon and purchased one of their pics... This photo represents the culmination of one heck of a project. When I started this project, as many of you well know, I just wanted to teach my son how an engine works; nothing more, and nothing less. I told him early on my final goal would be to take the final product on a "Celebration" ride along The Dragon. And now my friends...  I can say, she's finished!!!
Title: Re: ***FINISHED***: Father & Son 1988 K75S Rebuild
Post by: The Mighty Gryphon on April 26, 2017, 03:12:19 PM
Sounds like it's time to strip it down and make a cappuccino racer out of it now.
Title: Re: ***FINISHED***: Father & Son 1988 K75S Rebuild
Post by: Glacial on April 26, 2017, 05:08:34 PM
Sounds like it's time to strip it down and make a cappuccino racer out of it now.


NOOOOOOOOOO............!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Title: Re: ***FINISHED***: Father & Son 1988 K75S Rebuild
Post by: Martin on April 26, 2017, 05:41:11 PM

You might want to look at paint protection for the belly pan. Clear Plasti dip or clear vinyl wrap. Because mine is black at Gryphs suggestion I used Rustoleum bed liner.
regards Martin
Title: Re: ***FINISHED***: Father & Son 1988 K75S Rebuild
Post by: jay1622 on April 26, 2017, 08:00:04 PM
Gryph,
  No Sir, with a side of fat-chance!  :nono




Martin,


  I've got enough touch-up paint to hold me over for now. Reading your post; however, reminds me of this clear barrier wrap 3M makes where you cut it to size and apply it with heat. Now, there's a thought.
Title: Re: Brief Clip Added/Tail of the Dragon: Father & Son 1988 K75S Rebuild
Post by: stokester on April 26, 2017, 09:16:13 PM
I took advantage one of those roadside photographers from the Dragon and purchased one of their pics... This photo represents the culmination of one heck of a project. When I started this project, as many of you well know, I just wanted to teach my son how an engine works; nothing more, and nothing less. I told him early on my final goal would be to take the final product on a "Celebration" ride along The Dragon. And now my friends...  I can say, she's finished!!!
Yes!!!   Another K75S on the Dragon.
Title: Re: Brief Clip Added/Tail of the Dragon: Father & Son 1988 K75S Rebuild
Post by: Laitch on April 26, 2017, 09:36:06 PM
And now my friends...  I can say, she's finished!!!
:clap: I'm sure this project your son and you have completed is an inspiration for many who have tracked it.
Title: Re: ***FINISHED***: Father & Son 1988 K75S Rebuild
Post by: The Mighty Gryphon on April 26, 2017, 10:52:30 PM
When I inquired at the local collision shop who does my clearcoating about protective film the owner sent me to the local sign shop for the clear vinyl that signmakers use to protect sign artwork.  It's the stuff he uses and it's easy to apply, easy to remove if you want to replace it, and I got a piece off the end of a roll about 2ft x 3ft for FREE!!!
Title: Re: ***FINISHED***: Father & Son 1988 K75S Rebuild
Post by: jay1622 on July 05, 2017, 09:32:07 PM
Ya'll are gonna give me a load of crap for sure, but she's up for sale. A little over $7k invested. A c-list link will be posted in the for sale section if any of ya are interested.
Title: Re: ***FINISHED***: Father & Son 1988 K75S Rebuild
Post by: The Dude on July 06, 2017, 01:53:27 AM
C
A little over $7k invested. A c-list link will be posted in the for sale section if any of ya are interested.
I hope she goes to a deserving owner...Anyway,the main investment value you both put in to this project will always remain with you.
Title: Re: ***FINISHED***: Father & Son 1988 K75S Rebuild
Post by: Elipten on July 06, 2017, 10:38:40 AM
Great project with your son


Sent from my iPhone using Tapatalk Pro