1982 gs1100gk clutch stopped working

[Guest]

Sitting at a stoplight , let the clutch go and heard a bad sound.....and the bike she no goes
The gear box shifts through all the gears
I had installed new frictions about 4000 k ago
I pulled the clutch cover off, no offensive bits of aluminum to be seen
Pulled out all the frictions and steels, I can turn the back wheel by turning the sleeve hub(inner basket), but the moment I hit the rear brake the basket is slipping.....is this normal ?

thanks Robert

[Buffalo Bill]

Maybe the slip is at the rear wheel hub? Splines worn away?

[AMK]

Maybe the slip is at the rear wheel hub? Splines worn away?

Or maybe the secondary drive.
Which side of the bike did the bad sound come from?

[Dogma]

I've never heard of a clutch failing in a way that completely disengaged the engine from the drivetrain, unless the word "explode" was involved, and that was only in built-up drag bikes. Maybe I'll learn something here.

The output from the secondary drive does occasionally break, but the final drive spline is more likely, since an '82 drive spline is 100% going to fail eventually. You can do a quick check of the secondary output by pulling back the boot between the swing arm and the secondary drive to expose the u-joint. With the bike in gear, turning the clutch basket should turn the u-joint. If that's turning, but not the wheel, the final drive spline is gone.

[sixpack]

You sir are dead right, pulled the boot, the shaft she turns but the wheel does not
I was in the process of making a tool to take the big nut off etc etc , thank you so much for your direction
So the I guess it is the spline
What's my best option, can you still get this gear, I am kind of doubting it
I have had several GS shafties over the years with no problem, but this bike has a unknown past
, it may have 56k or 156 k who knows

thanks again Robert

[JTGS850GL]

^2nd the drive line splines are the rear wheel. 82 is a given that it will happen. Usually you get some warning sounds but it's very possible that it ripped through all the splines in one wack. If you can hear it go through all the gears but you're not moving then it must be between the secondary gears and the rear wheel.

[sixpack]

I shall button up the clutch and pull the rear end off and see what the damage is
I shall report back at that time
Again thanks for your help

Robert

[Charlie G]

Just pull the rear wheel and check the driven gear #14 (rear spline).

[Dogma]

56k km (Mm?) is just about right on time to fail. So I guess your odometer is roughly honest.

The final drive spline is available new (shop around for pricing, compare to partsoutlaw), as they are still using the design in current shafty models. Older than '82 they last forever with maintenance. after somewhere in '83 they last forever. A few around here have spares of good parts. In fact, talk to Burque73. The '81 850 he's parting out will have one of the good ones, and it will fit. Funny I can't find the thread now. I wonder what's going on there. Anyhow, they're around.

There's a way to tell by the color which ones will last, but I can never remember which is which. Some searching around here should turn up the info, or someone who remembers may chime in. It wouldn't hurt to have the color of one you're looking to buy confirmed in pics. Just make sure it's not the color of the one you wore out. Gold, I think.

Oh, one more thing. Lubrication of the new part should be moly paste. Moly 60. Check it and re-lube every tire change. One tube lasts the life of a few bikes. It's also good assembly lube for some things that won't get oil right away, like cams.

[sixpack]

I pulled the diff apart and it is the splines on the hub that drive the wheel that are worn so bad I can spin the diff on the wheel it self, hard to imagines how it whent so long and then bang ....she no go

The splines on the wheel are as good as new

[sixpack]

I bought this bike used and it lacked love by the previous owner
I turned it from a GK to a G , I like the bigger front forks, amazing how much better it handles by removing the fairing
Ditched the "touring" saddle and went with a basic G saddle
My ST1300 has 191,ooo k and I have put 19 rear tires on so far.........and I use the moly grease , I have had 1000g and 850 g both with 100,000 k plus with no issues .....just lube the dam splines
I see there are lots of used diifs in Ebay and from other wreckers , I can polish the drive unit to all who have provided feedback thanks so much
If any one has a good unit looking for a home I am in

R6

[sixpack]

I picked up a diff from a 850 $120 cdn , year unknown but the spline looks like new , the machining marks are sharp and clear
Back on the road again , bike is on collectors plates so I am ready for winter riding

thanks R6

[Charlie G]

I love happy endings......

[JTGS850GL]

Wow, very unusual for the diff side to wear out like that. Good thing that the diffs on these bike are so easy to find and are rarely damaged.