Author Topic: Building a bike that the mods will wish they had  (Read 66857 times)

Offline BENSPEN

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Re: K100rs Luftmiester Turbo
« Reply #50 on: November 03, 2016, 08:40:16 PM »
Sorry
well ben i previously posted twice but they seemed to have disappeared my pity is on you as i too tried to buy this from a bipolar man in maine but after a month in a half of haggling he twice blew me off on day of pick up  he also bragged to me that it ran and drove perfect but i could not test drive it   i was to buy it for 1900 i hope you did better  as parts for turbo system are hard to come by.  If you decide to change systems i might be interested in buying complete turbo system   let me know thanks  dan 1-203-675-3761

Sorry, I never saw your previous posts, they didn't show up!

And, OH MY GOD, the guy was such a douchebag, I didnt mention it because he belongs to this forum as well, but he consistently boasted about a bike which was clearly clapped out, like buddy, im not a naive 17yo!!! Consistently speaking condescendingly, calling me "kid". He made it impossible to schedule a date to pick it up, also he kept trying to guilt trip me into paying full price, like I am not financially smart because im 17?? I was in a buying position on a bike which had been for sale for months now, and he was being very belligerent. Like I said, I had to ship the bike because it was a 4 hour drive and his schedule changed a lot. Apparently, "everything worked"  :hehehe, does that not include the lights, all the gauges, the center stand, turbo, wiring, and a million others? The "Turbo Gauge Upgrade" was a crudely drilled hole in the knee plates with a loose, unhooked, nonfunctional boost gauge plopped in it.

Needless to say, I was very upset!

And Dan, I am currently not planning to sell the turbo system, If I do, I will let you know.
-Thanks!

Working on Speedo logistics!
  • VT
  • 87 K100rs

Offline BAMBAM1039

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Re: K100rs Luftmiester Turbo
« Reply #51 on: November 04, 2016, 08:48:47 AM »
HE WAS ONLY SLIGHTLY BI-POLAR   only text no phone calls and only once a day in the morning after his work shift one day all nice the next ranting and raving and being obnoxious the next day saying no im not mad at you why would you say that   im kinda glad i didnt go there and fork over the 1900 we agreed on  i wish you the best of luck  just remember the only good part about it was that it was the best version of the luft turbo made so it is worth rebuilding and preserving and its good for over 150 hp   again awesome project but if you want out of the turbo set up let me know  thanks again and keep us updated on progress
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Offline BENSPEN

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Re: K100rs Luftmiester Turbo
« Reply #52 on: November 18, 2016, 12:32:49 PM »
Mini Update for you guys,

I've decided to do the engine before the speedometer and firstly I wanted to check the compression before I pulled the head. All cylinders blew 165-170 except for cylinder #2, which had 95, I am going to currently assume that it is valve SEATS and that when I do a valve job, the issue will be resolved. So, I pulled the head, and everything was filthy, the head bolts/studs were VERY tight. I am going to pull the valves, clean all the carbon from the combustion chamber and piston (there is a lot) and then check to make sure the valves are true, then re lap the seats, and put it all back together.

AND, do valve seals. I am going to use these
http://www.ebay.com/itm/BMW-K100-K100RS-K100LT-K100RT-K-100-RS-LT-RT-VALVE-SEALS-VITON-/302033533548

ALSO, the cylinder crosshatching is great. Will post pics later.

-Ben
  • VT
  • 87 K100rs

Offline Laitch

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Re: K100rs Luftmiester Turbo
« Reply #53 on: November 18, 2016, 02:55:03 PM »
AND, do valve seals. I am going to use these
"best on the planet" He doesn't say which planet though, does he Ben? :giggles

Good luck with this procedure.
  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles
I wept because I had no radials until I met a man who had no splines.
https://tinyurl.com/RillRider

Offline BENSPEN

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Re: K100rs Luftmiester Turbo
« Reply #54 on: November 19, 2016, 07:27:12 PM »
Valves look great!

Thanks laitch! Hope the seals are good, I'll report back

Pic of an intake valve post lapping.

Also, can I please have someone's 2 cents on k100 head gasket longevity? Mine looks good and they are expensive.

Thanks!!
  • VT
  • 87 K100rs

Offline Martin

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Re: K100rs Luftmiester Turbo
« Reply #55 on: November 19, 2016, 08:05:47 PM »
 :nono Do not reuse the head gasket, they are required to compress in order to seal. The odds on getting one to seal again is extremely low. You would then have to disassemble the engine and replace the gasket, do you really want to go down that track. :nono
Regards Martin.

  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

Offline Elipten

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Re: K100rs Luftmiester Turbo
« Reply #56 on: November 19, 2016, 08:44:59 PM »
You mean the odds of getting one to seal is low.


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  • San Antonio, TX
  • 1990 K75RT

Offline Laitch

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Re: K100rs Luftmiester Turbo
« Reply #57 on: November 19, 2016, 09:50:34 PM »
You mean the odds of getting one to seal is low.
Maybe he means th' odds ay gettin' a body tae seal ur law.
  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles
I wept because I had no radials until I met a man who had no splines.
https://tinyurl.com/RillRider

Offline BENSPEN

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Re: K100rs Luftmiester Turbo
« Reply #58 on: November 27, 2016, 07:41:51 PM »
Thanks for the advice on the head gasket guys, I bought a new one.


But, I am in trouble right now with my valve and crankcase covers, HOW DO YOU STRIP THE PAINT.
I have tried aircraft paint stripper and it does not work well, should I buy a different brand of stripper (Rust Oleum) or do something else?


Would media blasting work?


Thanks,
Ben.
  • VT
  • 87 K100rs

Offline F14CRAZY

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Re: K100rs Luftmiester Turbo
« Reply #59 on: November 27, 2016, 09:28:49 PM »
Thanks for the advice on the head gasket guys, I bought a new one.


But, I am in trouble right now with my valve and crankcase covers, HOW DO YOU STRIP THE PAINT.
I have tried aircraft paint stripper and it does not work well, should I buy a different brand of stripper (Rust Oleum) or do something else?


Would media blasting work?


Thanks,
Ben.

Have you tried the Mar-Hyde aircraft stripper? I've bought it from Advance Auto Parts before. It actually is intended for stripping paint from airplanes, unlike the Rust O Leum stuff
  • Grand Rapids, MI
  • '87 K75C
'87 K75C w/ Pichler V1 fairing. LED's, CATZ driving lights, Audiovox cruise, LT top case, tons of other mods by Drake...


Offline BENSPEN

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Re: K100rs Luftmiester Turbo
« Reply #60 on: December 01, 2016, 08:15:39 PM »
Have you tried the Mar-Hyde aircraft stripper? I've bought it from Advance Auto Parts before. It actually is intended for stripping paint from airplanes, unlike the Rust O Leum stuff


I did, but I got the KLEAN-STRIP "Aircraft paint stripper" and I used 3 coats without prevail. little puzzled.


2 important questions for you seasoned professionals


1.should i use spray engine paint or automotive airbrush for my valve cover and crankcase cover??


2.What are the stock shim sizes for the intake and exhaust lifters?


Thanks!!
-Ben
  • VT
  • 87 K100rs

Offline Laitch

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Re: K100rs Luftmiester Turbo
« Reply #61 on: December 01, 2016, 10:07:08 PM »
2.What are the stock shim sizes for the intake and exhaust lifters?
You should get better acquainted with the MAXBMW parts fiche, Ben. This is the link to your bike's model and year. In the category Literature on the left side of the page, scroll to Diagram #11_1775 Timing Gear-Intake Valve/Exhaust Valve then click on it.  #10 in the parts list that will appear on the right side of the page gives you the breakdown in sizes.
  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles
I wept because I had no radials until I met a man who had no splines.
https://tinyurl.com/RillRider

Offline Martin

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Re: K100rs Luftmiester Turbo
« Reply #62 on: December 02, 2016, 01:58:56 AM »

Rustoleum  satin black is a good match for the original finish.
Regards Martin.
  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

Offline BENSPEN

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Re: K100rs Luftmiester Turbo
« Reply #63 on: December 04, 2016, 11:37:19 AM »
Martin, Thank you, I will look into that can.


Laitch, Thank  you, but I should have made my question more clear, I have 8 shims, 4 of them are 2.50 and 4 of them are 2.55, leading me to beleive that the valve shims are stock, what do you think is intake and which is exhaust? Thanks!


I apologize for making this more of a Q&A thread, but I have 2 more questions.


1. What is the biggest tire width I can use on a y spoke rear tire and a k1100rs center stand?


2. Does sidewall asect matter?


Thanks!
  • VT
  • 87 K100rs

Offline Martin

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Re: K100rs Luftmiester Turbo
« Reply #64 on: December 04, 2016, 12:21:51 PM »

Valve shim size is pretty irrelevant, what you are aiming to get is a clearance of .006 to .008 on the intake valves and .010 to .012 on the exhaust valves when the engine is cold. Due to the fact that Turbo engines run hotter the clearances which I have shown could be slightly larger you will have to check with Luftmiester. Unless you are going to remove the camshafts while adjusting the shims, special tools are required. These are available through polepenhollow on line or you can make them if you have the tools to do so.. How to adjust them is available in the manual or on this site. But as a starting point I would put the thinner shims on the exhaust lifters.
Regards Martin
  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

Offline BENSPEN

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Re: K100rs Luftmiester Turbo
« Reply #65 on: December 09, 2016, 01:00:30 PM »
Martin, thank you very much, I will be rebuilding the engine next week, but right now, the tank and covers are at the painters awaiting paint, then it will start to look like a motorcycle again.


Before I rebuild the engine, I would like to make sure my rings are in good shape, What is good installed ring gap on a k100? Im sitting at .320mm and I dont know if I dont know if i should Replace.


Thanks again guys!
-Ben
  • VT
  • 87 K100rs

Offline Martin

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Re: K100rs Luftmiester Turbo
« Reply #66 on: December 09, 2016, 04:54:57 PM »

* BMW_K75_K100_Repair_Manual.pdf    Kindly available from this site. Piston ring information available in the pdf I section 11-09.Top compression ring 2nd compression ring and oil scraper ring all have different end gap specifications which is available in my Haynes manual. If you don't have a manual you should have, some people say the Clymer is better. however any is better than none.  In OZ the Clymer manual is pretty thin on the ground, a mate has 4 Haynes no Clymer, I have one early Haynes and one late one. So please download the above manual, they do have an advantage in that you just print the relevant section as needed, if its still clean keep aside. If you keep your bike long enough you will end up with a printed manual. :hehehe
Regards Martin.
  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

Offline Donmystic1

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Re: K100rs Luftmiester Turbo
« Reply #67 on: December 14, 2016, 12:18:42 PM »
I own Serial number 3 of 20 that were made in 1986. ( The costs back then was in the high $4000 range plus a day and a half for installation) which is mounted on a 1986 K100RS that was found sleeping in a barn near Chicago for a long time.
I know where serial number 18 is ( Located in VT ) and another one in SW NY State. Yours will make four that are survivors.
What serial number is embossed on your turbo and does it have a split intercooler or a solid one piece one?
The solid intercoolers were know to overheat thus the design change to a split one.
They are very rare.

Don
Mystic, CT
860-460-3282
  • Mystic, CT
  • 1985 K100, 1985 K100RS, 1986 K100RS Turbo,1985 K100RT

Offline The Dude

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Re: K100rs Luftmiester Turbo
« Reply #68 on: December 14, 2016, 05:56:06 PM »
They are very rare.
So Don,how does it go?

  • Auckland, New Zealand
  • K75s
Current.
TR6R 1973 from new.
Moto guzzi 850 III .1983 from,almost, new.
K75S 1986 from new.vin-0103141
On my second millionth km.give or take a hundred k Kay's.
"The Dude abides. I don't know about you but I take comfort in that. It's good knowin' he's out there."
All the best!

Offline Donmystic1

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Re: K100rs Luftmiester Turbo
« Reply #69 on: December 14, 2016, 06:09:20 PM »
When you roll it on at 50+ you better be holding on . If your not the bike is going to leave you sitting in mid air. :eek: :eek:
  • Mystic, CT
  • 1985 K100, 1985 K100RS, 1986 K100RS Turbo,1985 K100RT

Offline BENSPEN

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Re: K100rs Luftmiester Turbo
« Reply #70 on: December 14, 2016, 09:48:52 PM »
When you roll it on at 50+ you better be holding on . If your not the bike is going to leave you sitting in mid air. :eek: :eek:


Haha, it was so slow when the turbo was siezed!! cant wait to get everything rebuilt and ride it next spring. cool to know someone is knowledgeable about the bikes!! like to see someone else's turbo one day, I spotted another K over the summer and I really wanted to chase him down, but the red light took forever!




i see a 24 on the turbo but i dont know if thats the right #


i have the split intercooler!
* BMW_K75_K100_Repair_Manual.pdf    Kindly available from this site. Piston ring information available in the pdf I section 11-09.Top compression ring 2nd compression ring and oil scraper ring all have different end gap specifications which is available in my Haynes manual. If you don't have a manual you should have, some people say the Clymer is better. however any is better than none.  In OZ the Clymer manual is pretty thin on the ground, a mate has 4 Haynes no Clymer, I have one early Haynes and one late one. So please download the above manual, they do have an advantage in that you just print the relevant section as needed, if its still clean keep aside. If you keep your bike long enough you will end up with a printed manual. :hehehe
Regards Martin.


thanks again martin, great info. i have a clymer manual but i leave it with my bike (not at my house)


  • VT
  • 87 K100rs

Offline BENSPEN

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Re: K100rs Luftmiester Turbo
« Reply #71 on: December 14, 2016, 09:51:32 PM »
also donmystic, i think they put different turbos on the redesigned models, i have an ihi rhb52 vc19
  • VT
  • 87 K100rs

Offline Laitch

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Re: K100rs Luftmiester Turbo
« Reply #72 on: December 14, 2016, 10:24:12 PM »
also donmystic, i think they put different turbos on the redesigned models, i have an ihi rhb52 vc19
I think Don already said that in post #67, Ben, but I suppose it bears repeating. :giggles  In fact, I think you and he have the same style turbos.  :mbird
  • Along the Ridley in Vermont.
  • 1995 K75 89,000 miles
I wept because I had no radials until I met a man who had no splines.
https://tinyurl.com/RillRider

Offline Donmystic1

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Re: K100rs Luftmiester Turbo
« Reply #73 on: December 15, 2016, 12:09:40 PM »
The serial number should be on the intercooler. (see photo )
There is another number embossed on the turbo itself. which is an IHI turbo
Mine is Serial number RHB5048448 and is also a VC19
While the serial number of the turbo kit is ?? 850003
You have the same turbo as mine a RHB5 with the spec of VC 19.


XS Turbo Boost in Ohio found a lot of corrosion inside the turbo caused by exhaust gases and had to polish the surfaces to regain the sealing ability of the oil seals and turbo vanes.
You also should take off the end cap of your Luftmeister Muffler and pull out the baffle. It will need repaking as it gets saturated with oil. See Picture. I Hve plenty of packing material if you need it.
  • Mystic, CT
  • 1985 K100, 1985 K100RS, 1986 K100RS Turbo,1985 K100RT

Offline nods

  • Sydney, Australia
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  • 1985 K100 RT
Re: K100rs Luftmiester Turbo
« Reply #74 on: December 19, 2016, 08:25:41 PM »
Rustoleum  satin black is a good match for the original finish.
Regards Martin.


Thankyou, bookmarked!  :clap:
  • Sydney Australia
  • 1985 K100 RT

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