Un-remarkable BMW re-fresh. DONE.

[cookiemech]

Re: A rather un-remarkable BMW re-fresh.

I don't recall an o-ring on the clutch pushrod. I'm wondering why you don't want to pull the transmission completely; to get this far, you've already done all the "heavy lifting". That permits a much better cleanup of both transmission splines and the clutch hub splines. And note that for some reason the rubber boot at the rear of the transmission (around the clutch pushrod) is a bit fussy so that it doesn't leak. You just want to make sure it doesn't have any cracks, and that you are only using the correct (original type) clamp, tightened "just enough". I had one of those just about drive me mad once; it persisted in a slow drip (this was on a friend's bike). There's no seal keeping transmission oil from entering that boot, so the boot itself has to seal against leaks.

Of course, if you're working from the floor (and by yourself), I can sort of see why you might be loath to pull the trans. It's important when reinstalling it that you are aligned pretty much perfectly so as not to bend that pushrod.

 

[trek97]

Re: A rather un-remarkable BMW re-fresh.

This whole procedure is coming from a guy I am trusting at motobrick. And yes, I have local buddies I can call on for help w this sorta stuff. However they have zero motorbke experience whatsoever. Their idea of DIY maintenance is looking up the phone number for Harley maintenance dept. So, I would rather be able to quietly take my time and do it myself if at all possible. The drive shaft splines were pretty clean when I pulled them...so I am hoping this is the case w input shaft. Just a job of removing old grease as best I can and add some fresh. Easy Peasy, confidence building, learning as I go baby steps for now.

I messed w the clutch boot (leaking) early on. I cleaned it up, found no cracks and stopped the leak by adjusting the clutch cable to proper spec. I am going to install my zerk modified lever, pull boot off, clean it out, and put a dab of black silicone around it upon re-installation.

 

[cookiemech]

Re: A rather un-remarkable BMW re-fresh.

I'm sure that will work OK; I'm just fanatical about everything being surgically clean on both the male and female splines on the trans input shaft. Presumably the fellow you're working with (the BMW guy) has recommended a particular spline lube. The standby for years was the Honda Moly 60, which I've used many times with (apparent) success, but it's NLA. I have a can of some Loctite Moly Paste

https://www.amazon.com/gp/product/B001HWBSJW/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1

that I found after considerable research, but haven't tried it yet.

 

[trek97]

Re: A rather un-remarkable BMW re-fresh.

Kiley recommended Honda auto moly 77. (But I woulda had to order it) so, I used Moly 77 from Subaru dealer.
But I am seriously considering Chemco Industries Impact lube. Specifically formulated for high impact, sliding, rotation situations such as splines, etc. I love it for (steering stem bearings, swing arm bushings) I also use it at work.
So, yep Im going w that. Ha. BTW Also, sending Kiley a tube of Impact grease to try.

http://chemcoindustries.com/Lubricant-Grease-Lubricant-Impact-Lube

 

[cookiemech]

Re: A rather un-remarkable BMW re-fresh.

That stuff looks good; hope you were able to buy a single tube instead of 12 lifetimes' supply!

 

[bmwnutt]

Re: A rather un-remarkable BMW re-fresh.

You're doing a great job! Enjoying all your posts and pictures. You may already know this, but just in case..... When greasing the input splines you should clean clutch and input shaft splines. But only apply grease to the input shaft and only sparingly. What you don't want to do is push excess grease out of the clutch plate spline and then have centrifugal force fling it onto the clutch plate.


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[trek97]

Re: A rather un-remarkable BMW re-fresh.

You're doing a great job! Enjoying all your posts and pictures. You may already know this, but just in case..... When greasing the input splines you should clean clutch and input shaft splines. But only apply grease to the input shaft and only sparingly. What you don't want to do is push excess grease out of the clutch plate spline and then have centrifugal force fling it onto the clutch plate.

Thanks bro!

This morning...This!

Cut the heads off the 2 8x120mm bolts. To use as supports and guides.

Toughest part of the whole job was removing the clutch lever without damaging the bushings and Unplugging the coils. HA!!!

Splines look a bit dry and dirty. Otherwise appear to be in perfect condition.

 

[cookiemech]

Re: A rather un-remarkable BMW re-fresh.

So you did pull the transmission all the way. Good! Makes me feel better, even though it's not mine . . .

Yeah, those tiny circlips on the shaft for the clutch lever are fun, huh? Also like the fact you drilled, tapped, and installed a grease fitting on that lever. I once had to replace the lever on my K75RT after a few winters' worth of salt found its way inside. Of course, I had greased the tiny roller bearings when I did my splines, but it's way better to have a method of forcing grease in there periodically.

 

[trek97]

Re: A rather un-remarkable BMW re-fresh.

I didnt intend to pull it.
But, once loose and on the bolts and I had a look at what I was actually dealing with.
You were right...thanks for the confidence booster bubba.

 

[trek97]

Re: A rather un-remarkable BMW re-fresh.

Started the clean up, lube and reassembly.

Gave the new gear switch a few thick coats of plastidip.

Got stuck here for a bit, splines would not mesh up. So quick advise from Kiley, I put her in gear and gave her a twist using the drive shaft. And she slipped right in.

Going back together. The grease zerk mod working as expected.

 

[3DogNate]

Re: A rather un-remarkable BMW re-fresh.

Well done sir... you may proceed.

 

[trek97]

Re: A rather un-remarkable BMW re-fresh.

Well done sir... you may proceed.

Thankyou my man. Hows the Triumph coming?

 

[3DogNate]

Re: A rather un-remarkable BMW re-fresh.

Thankyou my man. Hows the Triumph coming?

Good, just wiring, cables and fluids left...

And some warm days to do it.


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[trek97]

Re: A rather un-remarkable BMW re-fresh.

Good, just wiring, cables and fluids left...

And some warm days to do it.

Sweet!

I got to give it up for tonight. Wife has our Anniversary diner ready and its getting cold.

 

[trek97]

Re: A rather un-remarkable BMW re-fresh.

Funny how things can go.
Spent 2 hours psyching myself up for "The Dreaded Swinger Boot Installation. I just knew this was going to be a terror.

So, procrastinated by cleaning up and installing coils.

Then, no choice, ugh, cleaning up the swinger.

Got set up, gave it a couple half hearted wiggles and twists...and "THUMP!" It popped on.
I pulled and twisted and pulled like 50 times...it tugged back every time. THANK GOODNESS!

 

[cookiemech]

Re: A rather un-remarkable BMW re-fresh.

Yeah, if your boot is in decent condition, it generally pops right on.

Everything looks so nice and clean in there! Doubt mine's been that clean since it was new (I do clean the pieces that really matter, but cosmetics in that part of the bike rarely rate such attention!)

 

[trek97]

Re: A rather un-remarkable BMW re-fresh.

I figure long as Im in there. Not like I have a big ride planned anytime twixed now and May.
Also, Other than little stuff. Currently at a stand still on her. My tire buddy Tim and I are gonna install fresh valve stems. So, not installing tires til hes available. Also waiting for Kiley to send the water pump seal tool.

Til then I will keep scrubbing and start sanding/stripping, prepping stuff for paint.

 

[trek97]

Re: A rather un-remarkable BMW re-fresh.

Oh, and my daughter and her boyfriend have come home for the weekend and taken over the living room. Started watching Harry Potter on Saturday. And just now getting to the last one. hahaha. I think the poor dude is on Harry Potter overload.

So, Pandora and I are having an affair in the garage. ;D

Friday was Tuesdays Birthday, Yesterday, Our 24th wedding Ann'y, and off work for MLK today.

 

[tegboi]

Re: A rather un-remarkable BMW re-fresh.

Keep up the amazing work. I had a '88 K75 for a short time, picked it up for a trade of my '89 Suzuki GS500, the friend didnt like the K75, was too tall for him. I loved the bike, had heated grips, windscreen, hard bags and center bag. Did light maintenance on it, then came a fuel pump issue, then the cable for the clutch snapped while I was about to take off for a ride. After that, learning more about the splines issue, and mine having over 50k on it, I decided to sell the bike shortly after. You're doing all the work I was forseeing for it's future.

 

[cookiemech]

Re: A rather un-remarkable BMW re-fresh.

Too bad you didn't have some BMW guys around you (it would seem) for support . . . 50K is barely broken in for a K75, and the splines do not fail if they are properly maintained. These bikes are (IMO, of course) the best that BMW ever made, or ever will make. They are way overdesigned, overbuilt, and (somewhat) underpowered (though they will run 100 mph all day). I have never seen one use a drop of oil.

Every time I ride one of mine (had the K75RT out yesterday for about 70 miles) I marvel at the fact that they are just as tight and competent as they would have been new (bought each when they were a few years old).