Awakening 1987 K100RS from 10 year slumber.

[Scott_]

You also have that time to get new rubber caps for the vac ports.. even without my glasses I can see that the one on #1 is cracked and split.

[SpecialK]

You also have that time to get new rubber caps for the vac ports.. even without my glasses I can see that the one on #1 is cracked and split.

Thanks Scott. Can you explain where the vac ports are? I don't see that terminology in the Haines manual.

[SpecialK]

You now have 10 days to pull the throttle bodies and check for cracks in the rubber bushings above and below them.  Any cracks will allow air leaks that will mess up the running of the engine.

Is this what you are referring to Gryphon? Thanks.


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[Laitch]

Is this what you are referring to Gryphon? Thanks.

Can you explain where the vac ports are? I don't see that terminology in the Haines manual.

These are them.

[Laitch]

Can you explain where the vac ports are? I don't see that terminology in the Haines manual.

Haynes, p.147. Sometimes imagination, extrapolation or translation need deployment. :giggles

[SpecialK]

Haynes, p.147. Sometimes imagination, extrapolation or translation need deployment. :giggles

Of course! Needed to extrapolate 4 more pages down. Those don't look too dificult to replace. :beer:

[SpecialK]

These are them.

Very helpful Laitch thank you.

[SpecialK]

Sent my injectors to Bill at Mr. Injector on Friday, 7/12 USPS Priority Small Flat Rate box. Checked tracking on Monday and it showed they were rerouted out in Idaho. I looked at my PO receipt and they had entered the wrong zip code by one number so it went to Donnelly Idaho instead of Dalton Gardens Idaho. They were delivered yesterday 7/17, two days later than they were supposed to. Oh well, no rush I guess. I should have them back early next week.

[SpecialK]

As of today injectors are done so should arrive Wednesday or Thursday. Here is what Bill said in an email to me:

"Hi John,
 ​ ​
Your injectors arrived and have been serviced. They had some flow loss and pattern irregularities, two of them were stuck,  but they cleaned up perfectly so if you continue to have problems you can rule out injectors as the cause. There will be a full flow report in the package. ​"

I'm not sure if this was the sole cause of the engine not starting, he said it should have at least sputtered, but apparently they were badly in need of service so I am glad I got it done.

[SpecialK]

The paint on my water pump has flaked off pretty badly. Is this common or is it caused by a failed gasket? i want to remove the cover and either repaint or have it powder coated.


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[SpecialK]

greetings...

i use gothic black nail polish from five below...

j o

I'll see if my grandaughter has some lying around. If not I'll use Fuschia.

[SpecialK]

Got the bike started today! 

Received injectors back on Thursday 7/25 from Mr Injector. The report said that 2 had no pattern and 0 flow, and the other two had bad pattern and a flow of 30. All injectors cleaned up and functioned 100%. The CC/Min after cleaning for all 4 was 160cc.

I first used a q-tip and cleaned the ports in the cylinder head. There was some black residue in there probably from the old o-rings. I then placed all injectors in the rail after lubing the o-rings, put the holding clips on, and inserted the assembly into the ports gently wiggling and tapping with a rubber mallet. Then put the wire clips and wires back on and connected the fuel lines.

Rolled the bike into the driveway and with nervous anticipation pressed the start button hoping to hear it fire to life after many years. No choke, the engine cranked for about 5 seconds and nothing. I figure the fuel had to get through the lines so I took a breath and tried again. This time I could hear it start to turn over so I kept the starter pressed for another 5-10 seconds and let go to a running engine. I gave it some gas and it reved right up (with smoke of course. I had added some oil to the cylinders a few weeks ago for compression). I let it run about 5 minutes and the smoke cleared up. I was surprised at how smooth it was, idling without any misfires at 1.5rpm and reving easily. So I guess the injector cleaning was the limiting factor in getting it started.

I turned it off for now until I can get ready for the next set of items to be looked after.

Can short video clips be uploaded and posted?

[SpecialK]

There are a host of items I want to attend to now that the bike is running so any input from you guys would be appreciated.
Here are some concerns:

-I initially drained the old coolant, refiled with 50% vinegar/water, drained again and filled back with water. I wanted to wait until I got the bike started so the pump could circulate the water, then I could drain and fill with 50/50 coolant.
-Also, now that the bike can warm up I need to change the oil and filter. Got the filter and wrench a couple weeks ago.
-Check and change air filter.
-Replace vac port caps ($2 each at MAX).

After taking care of the engine related items, I want to turn my attention to the brakes and fluid and then the drive train and splines, then take it for a short ride to see how everything is working.

There was some smoke coming out from underneath after it ran for a couple of minutes. There is some oily seepage around, not sure from where but I think maybe a gasket somewhere needs replacing. Anything I should be looking for?

Thanks.

[Martin]

In order to find leaks it is best to thoroughly clean and dry the engine. If you have a belly pan remove it. Place paper under the bike to identify drips. You should be able to roughly identify the suspect area. Spray the suspect area with spray on talc in your preferred fragrance. Run your bike on the stand and check for wet spots on the paper on the talc.
Regards Martin.

[Laitch]

Can short video clips be uploaded and posted?

Upload them to YouTube then post links to the videos here.

[SpecialK]

Here is a clip of the bike starting. Not the first time starting, maybe the fifth.

https://www.youtube.com/watch?v=iehAobMlwhI&feature=youtu.be

Filled the radiator today. I drained the water I had in there and put 2800ml of 50/50 coolant while massaging the hose. That brought it near the top of the fill tube. Then I added to the overflow tank to the bottom line. Mine has the temperature sensor on the drain bolt so after screwing the bolt back in I attached the wire from the temp gauge.
Does this sound correct? After I start it again should I let it heat up for a while and look for the fan to come on or if any fluid is backing into the overflow tank?

[Laitch]

Does this sound correct?

Everything seems ready to go. Coolant when needed can be added to the reservoir. Keep the level between the Max and Min lines. With a 50:50 coolant mixture in hot weather like we've been having, the fan should activate intermittently in slow or stopped traffic. The overheat indicator should not light up. If you just let it idle in your driveway, the fan—if not seized—should turn on in 10–15 minutes or so. It will run briefly but intermittently until the moto is in motion.

I'm getting a prompt that your video is not available when I try to access it. Can you access it using the link in your post?

[SpecialK]

I'm getting a prompt that your video is not available when I try to access it. Can you access it using the link in your post?

Yes I can. I think because I posted "private" on youtube. I thought since I provided the link anyone on Motobrick could see it but I will re-post using "public" then copy the link again.

Try now. Thanks.

https://www.youtube.com/watch?v=iehAobMlwhI&feature=youtu.be

[Laitch]

Sounds good!

[SpecialK]

I called MAX BMW for a spline service quote. $396. I think I will use Chris Harris's video and do it myself.

Took out the air filter today. It is a BMW Einsatz filter that looks like it was replaced just before the bike was stored. I didn't see any noticeable dirt (see photo). Save $44.
Also changing the oil today.


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[Martin]

Possibly because of the location of the intake OEM filters are extremely long lasting and extremely efficient. I'm on my second since I bought it 21 years ago, the first is still fine. To clean I just tap it flat on a hard surface and vacuum with a industrial vacuum.
Regards Martin.

[billday]

I think the air filter is about 3 times larger than it needs to be. One of those things you think about once in your Motobrickin life.

Good on you for doing your own splines. It's a great relationship builder.

[The Mighty Gryphon]

Air filters were one of the items that back in the '80's were mandated by the EPA to have service lives of 100,000 miles.  Hence, they got fairly large, and other tricks were used to limit the dirt they had to catch and hold.

[Laitch]

Air filters were one of the items that back in the '80's were mandated by the EPA to have service lives of 100,000 miles

In The Code of Federal Regulations, Protection of the Environment, Title 40, Parts 85 to 99, revised July 1, 1990, p.466, §86.428–80(e) indicates that air filters—among several other items—are not subject to emissions rules and their periodic change intervals are specified by the manufacturer's maintenance instructions. Their operating environment would probably be cited in those instructions, too, something like if operated in a dusty environment, inspect often, clean or replace when needed. Not that I'm trying to be contentious. 

The size and quality of OEM filters is just engineering excess that serves the owner and the moto well. Maybe they got a deal on them at Big Lots during the engine's development phase.
 

[The Mighty Gryphon]

In The Code of Federal Regulations, Protection of the Environment, Title 40, Parts 85 to 99, revised July 1, 1990, p.466, §86.428–80(e) indicates that air filters—among several other items—are not subject to emissions rules and their periodic change intervals are specified by the manufacturer's maintenance instructions. Their operating environment would probably be cited in those instructions, too, something like if operated in a dusty environment, inspect often, clean or replace when needed. Not that I'm trying to be contentious. 

The size and quality of OEM filters is just engineering excess that serves the owner and the moto well. Maybe they got a deal on them at Big Lots during the engine's development phase.
 

Looks like I'm a little behind the curve.  When I was in the industry back in the '80's there was a lot more covered.  The idea being that any part of the engine operating systems that could affect emissions or efficiency would have to function for the "useful life"(approximately 100,000 miles at the time) with no owner/operator intervention.  This meant that tune ups and part replacement were not required for that period. 

The manufacturers and dealers didn't like the idea that their vehicles wouldn't require lucrative dealer servicing and tune ups.  To that end, they continued establishing service schedules, but they were mostly just inspections of the underhood stuff for damage.  I pretty much got out of the business in 1988, so stopped getting the industry journals and my legal knowledge stopped being updated.  Since then, I have owned 15 automobiles.  Not one of them had any maintenance beyond oil changes in the first 100,000 miles.  All but the recently purchased vehicles went to beyond 200,000 miles, with 6 of them going beyond 350,000.  I had a Honda Accord that went 300,000 miles on the original spark plugs.

Modern automobiles are amazingly maintenance free, mostly because of government mandates.  A lot of that engineering philosophy has carried over to our bikes and, legislated or not, it shows in the air filters.