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shim the cush drive

  • Thread starter Thread starter mriddle
  • Start date Start date
M

mriddle

Guest
Anyone ever hear of this .. adding shims to take up some free play and reduces the lash you feel when applying and releasing throttle?
 
Not on a street bike. You could check to see if their worn out (not likely), but I wouldn't shim them. The shims might chew up the rubber and make things worse.
I would make sure the chain is adjusted correctly, the front sprocket nut is tight, and doesn't have damaged splines first.
Fwiw, I've noticed slightly less "lash" with the 530 conversion.
 
The place I saw this mentioned finding a thin silicone sheet (a cutting board .. wonder that should be safe enough to use without chewing up the cush rubber) ..

The cush pads were trashed on my 83 .. I swapped in some used ones (from a spare wheel) and noticed a big difference. Guess I should go on and order new replacement parts.


Oh well .. seemed like an interesting thought.
 
If their chewed up, then replacing 'em is really the only fix.
You must be really abusing that bike to kill the cush drive.
Been getting riding pointers from The Cafe Kid? :-k
 
8trackmind said:
If their chewed up, then replacing 'em is really the only fix.
You must be really abusing that bike to kill the cush drive.
Been getting riding pointers from The Cafe Kid? :-k
Click to expand...
Ahh owww ohh my that hurt.. heh.
 
Well .. now that you mention it ..

Nah .. I think Jethro beat them up before I got the bike. ..

The ones I put in look to be in good shape .. just a little bit of stress cracks ..

I should get new ones I suppose .. but again .. this seemed like a way to tighten up the slack a little bit .. even with new cush rubber.
 
8trackmind said:
Let me guess...he got the used cush drive from you...:-s
Click to expand...
No actually, I have nothing to do with his cush drive, or his riding pointers. Hope you got an older inner hub spline in that 850 of yours Captain Marvelous, or you'll find out soon enough.
 
mriddle said:
I should get new ones I suppose .. but again .. this seemed like a way to tighten up the slack a little bit .. even with new cush rubber.
Click to expand...

Shouldn't be much slack with new ones. I would be afraid the extra vibration from shimming them could crack the splines in the wheel.
 
TheCafeKid said:
No actually, I have nothing to do with his cush drive, or his riding pointers. Hope you got an older inner hub spline in that 850 of yours Captain Marvelous, or you'll find out soon enough.
Click to expand...

I do. I also have a complete spare from an early model as well, Cupcake. :D
I still don't trust it though. Chains forever.
 
8trackmind said:
I do. I also have a complete spare from an early model as well, Cupcake. :D
I still don't trust it though. Chains forever.
Click to expand...

Good onya then, shouldnt have a problem. I have a couple myself, Grandpa tossed in with the GK (well ones ON the GK) worth their weight in gold..

Tho, i have to agree, wont catch me buying another shaftie. Even tho i did. It will be MY last...
 
I bought a Kawasaki ZX6 and it had a good 10-15 degrees of lash in the rear hub. Pulled off the cush hub and wrapped each rubber block with a couple rounds of bicycle inner tube. Stuffed everything back together and the lash was almost completely gone. Huge improvement. Not sure how long the inner tube will last since I sold the bike, but it was effective.
 
So the cush drive is part #15 on the Bike Bandit page but it's not clear if that is one big piece or multiple small ones? How many of those do I need to order?

Many thanks...
 
Shimming the cush drive rubbers is a common repair ive been doing for 30 years or so & is fine, safe & causes no problems

heres my way of doing it ......... first check that the rubbers are not badly degraded or split (they are usually just squashed a little) then cut some pieces of old innertube & glue ONE piece to the outside of the oriiginal rubber, allow to completely dry then refit the cush drive, you may need to lightly oil the rubber as it will now be a tight fit

tone :)
 
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