Stuck on side of the road... (clutch?)

[bobmusick]

Hey y'all. So I haven't really posted here much but here I am so hello!

1990 K100LT for reference.

But anyways I was just driving along in 5th gear and suddenly this awesome grinding noise starts coming from under me, the gear number display says 3rd and 5th randomly then I pull in the clutch to try just something and nothing seemed to work. Every gear made the noise and even when the clutch was pulled in. No power at all to the wheel. So yeah. Just in time for a thunderstorm!

Will try to post more positive things soon! Ha

[Laitch]

Ha

Did it sound like this??

[bobmusick]

Did it sound like this??

Yes indeed

[Laitch]

A used transmission with good input and output splines would cure that. Like Chris says, you should look at the driveshaft and rear drive splines, too. How many miles on the bike?

[Filmcamera]

I just got a used transmission for $120 plus shipping and there were others out there for sale as well

[Motorhobo]

Could be just bad clutch disk splines, no? Wait till you get the tranny off before you pass judgement on it.

[Laitch]

Wait till you get the tranny off before you pass judgement on it.

+1

[bobmusick]

Thanks all, as soon as I get my other project out of the garage I'll get the tranny off and take a look. The guy who had this before me said he did a lot of the transmission work himself so idk what the means coming from him.
Judging that I drove it one season then this happened.... hmmm


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[bobmusick]

I just got a used transmission for $120 plus shipping and there were others out there for sale as well

I may take you up on that offer. Seems like a pretty good price. Where are you located? Always down for a road trip so long as it's not too far.

[Filmcamera]

Sorry Bobmusik I meant I just brought one for myself at that price. Last weekend I messed up second gear on my tranny redlining the bike in 2nd...  :riding:


I was just pointing out that second had transmissions are available and not that expensive.


Also I am in Costa Rica so it wold be a heck of a road trip... close to 4,000 miles!

[The Mighty Gryphon]

Bob,  I have been tripping over a late 80's K75 transmission in my garage for over a year now.  I'm out near East Aurora, so there would be no shipping on it.  You can have it for the same $120 that Filmcamera paid for his.

There are a few differences from the 75 to the 100, but you can make it work by swapping a few parts over from your old one.  The main difference is the clutch push rod because the K75 has a different clutch from the K100.  All the important internal parts are identical between them so it's just a bolt up swap.

[bobmusick]

Sorry Bobmusik I meant I just brought one for myself at that price. Last weekend I messed up second gear on my tranny redlining the bike in 2nd...  :riding:


I was just pointing out that second had transmissions are available and not that expensive.


Also I am in Costa Rica so it wold be a heck of a road trip... close to 4,000 miles!

Ohhhh okay haha I gotcha.

[F14CRAZY]

Yeah I would definitely check out the clutch hub splines. Mine were near the failing point but my transmission input splines were fine

[bobmusick]

Bob,  I have been tripping over a late 80's K75 transmission in my garage for over a year now.  I'm out near East Aurora, so there would be no shipping on it.  You can have it for the same $120 that Filmcamera paid for his.

Hey! Think I sent a message back, got your private message. I will gladly take you up on the offer to pick up the transmission. Let me know when you're free and we can set a time up.

It's very kinda of you to offer to help work on it too. I'll gladly accept any help if needed but Ease Aurora is still a bit of a drive and till summer, my school schedule still is a bit messy. But hey if stuff works out then great!

[bobmusick]

General update to those following, we were able to get it back home the same night thanks to my kind neighbors. After getting yelled at by my one neighbor who owns a bike repair shop that does everything besides BMWs lol


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[The Mighty Gryphon]

PM sent.

Stay in touch until you get the transmission out and can tell for sure what the problem is.  No  sense buying one before you know if you need it.

[Andy FitzGibbon]

Hi Bob, I recognize you from the quattroworld allroad forum.


Here's a shot of where you'll need to get to to determine what's going on (excuse the messy shop).


Andy

[bobmusick]

Hi Bob, I recognize you from the quattroworld allroad forum.


Here's a shot of where you'll need to get to to determine what's going on (excuse the messy shop).


Andy

Omg small virtual world!

That's awesome thanks for that. I'm sure everyone's garage goes through that. Mines a mess due to an unexpected rabbit issue. Buuuut I think it's almost over; putting stuff together now. So I'll be able to have all the space I need.

[Laitch]

Hi Bob, I recognize you from the quattroworld allroad forum.

Omg small virtual world!

Bromance alert!

[Andy FitzGibbon]

Bromance alert!

Those who choose to drive and maintain an Audi A6 allroad are automatically entered into an exclusive masochists club.

[bobmusick]

Hi all,

I was able to get the transmission off yesterday. I got it up on the workbench and opened it up, to my surprise it seemed like everything was fine. So I looked back to the clutch, which at first glance (to someone who has never really looked at one before) seemed fine. But then I saw that the teeth in the center of it were pretty ground up. So I guess it looks like all I need is a clutch? Or the center part of it? All the oil in it was clean. Actually all the oil everywhere was. So it was probably a bad idea to open up the transmission buuuut I tend to always skip to the more complicated stuff before looking at the easy and simple solution.





Another quick question before I put the transmission back together... it looked like there was some sort of sealant on it, and I couldn't see about any in the manual I use.

Thanks!! Should be pretty easy at this point is seem.

[Laitch]

I was able to get the transmission off yesterday. I got it up on the workbench and opened it up, to my surprise it seemed like everything was fine. So I looked back to the clutch, which at first glance (to someone who has never really looked at one before) seemed fine. But then

Post a straight-on photo of the splined shaft the mated to the clutch disc.

[Martin]

Splines look stripped. I think you will find that when you remove the clutch plate and stick it on the input gearbox shaft it will probably just spin.
Regards Martin.

[Andy FitzGibbon]

You need a new clutch, and- depending on the condition of the mating splines- possibly a new transmission input shaft as well.


How do the driveshaft splines look?


Andy

[Motorhobo]

Another quick question before I put the transmission back together... it looked like there was some sort of sealant on it, and I couldn't see about any in the manual I use.

One possible cause of the sealant might be as seen in this video -- caution, Chris Harris lets loose a barrage of expletives to describe any idiot who uses said sealing in the installation of a K-clutch.



In short, watch the video and don't do what that moron did. You'll need to center the clutch plate in the clutch assembly. You can either use a special tool for that or you can do what F14CRAZY does -- more info here:

http://www.motobrick.com/index.php?topic=7213.0

If you're talking about sealant on the mating surfaces of the transmission and the bell housing, that's not necessary or desirable -- don't do it.