Bad Drive Sprocket Rubber

davidsuserid · 09-02-2008, 06:34 PM

My bike has quite a bit of play in the rubber thing inside the rear wheel, should this be a tight fit between the fins on the hub and the rubber, or should it have some play.

mr. softie · 09-02-2008, 08:03 PM

I have been wondering about that too. I looked at it when I had the rear wheel off, and the rubber part looked fine, but there is some play.

Easy Rider · 09-02-2008, 08:36 PM

Quote:

Originally Posted by davidsuserid

My bike has quite a bit of play in the rubber thing inside the rear wheel,

Me too. I think it's normal. Does make things a bit jerky at times though.

**jonathan180iq** · 09-03-2008, 04:39 PM

Yeah. The cush drive on these bikes really allows a lot of play, more than I was used to when I first got the GZ.

It's pretty normal.

Honestly, I have never taken a look at mine, but on many bikes out in the motorcycle world a common way of stiffening them up is to shim the gaps with cut of plastic shims.

Do a little web search and you'll see what I mean.

Sarris · 09-06-2008, 04:34 PM

I had my Cush Drive rubber replaced @ 12k miles because my mechanic said that anything more than 1/4" play is excessive. He also said that they have a tendency to wear out at about 12k to 15k miles if the bike does a lot of stop/start low speed riding. Replacing it really makes a big difference in the feel of the clutch/shift engagement. The bike rides much smoother without any lurching or banging on clutch engagement or acceleration/deceleration. For me, it's worth the $11 ($18 shipped from Ron Ayers), and since its cheap and an easy install, I'm putting it on my 12k service list.

:2tup:

5th_bike · 09-07-2008, 08:31 PM

Quote:

Originally Posted by Sarris

anything more than 1/4" play is excessive

Do you mean, measured at the outside of the rear sprocket i.e. if you can move the chain and teeth forward & back more than 1/4", the sprocket rubber should be replaced ?
OR 1/4" at the rubbers themselves, say at the bolts of the sprocket ?

Sarris · 09-07-2008, 09:08 PM

If you can move the sprocket & hub (via the chain) 1/4" or more before it hits the rubber inside, it's worn out. You'll be amazed how smooth it rides after replacement. It's also easy to replace. You don't need to fully remove the wheel, just remove the axle, drop down the wheel, slide the sprocket hub out, and replace the hub shock absorber (aka cush drive rubber) paying attention to the alignment within the wheel hub. Check out the parts manual for an exploded view.

09-02-2008, 06:34 PM	#1
davidsuserid Member Join Date: May 2008 Location: Kissimmee, FL Posts: 53	Bad Drive Sprocket Rubber My bike has quite a bit of play in the rubber thing inside the rear wheel, should this be a tight fit between the fins on the hub and the rubber, or should it have some play. Login or Register to Remove Ads
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09-02-2008, 08:03 PM	#2
mr. softie Senior Member Join Date: Jun 2008 Location: Bucks Co. PA Posts: 361	Re: Bad Drive Sprocket Rubber I have been wondering about that too. I looked at it when I had the rear wheel off, and the rubber part looked fine, but there is some play. __________________ The real money in a gold rush is in supplying liqueur and women to the miners.... May the wind always be at your back and the sun overhead as you make your way down the ever winding, smoothly paved, traffic free road!
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09-03-2008, 04:39 PM	#4
jonathan180iq Super Moderator Join Date: Jan 2007 Location: Dalton, GA Posts: 3,996	Re: Bad Drive Sprocket Rubber Yeah. The cush drive on these bikes really allows a lot of play, more than I was used to when I first got the GZ. It's pretty normal. Honestly, I have never taken a look at mine, but on many bikes out in the motorcycle world a common way of stiffening them up is to shim the gaps with cut of plastic shims. Do a little web search and you'll see what I mean.
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09-06-2008, 04:34 PM	#5
Sarris Senior Member Join Date: May 2007 Location: New Port Richey, Florida USA Posts: 1,348	Re: Bad Drive Sprocket Rubber I had my Cush Drive rubber replaced @ 12k miles because my mechanic said that anything more than 1/4" play is excessive. He also said that they have a tendency to wear out at about 12k to 15k miles if the bike does a lot of stop/start low speed riding. Replacing it really makes a big difference in the feel of the clutch/shift engagement. The bike rides much smoother without any lurching or banging on clutch engagement or acceleration/deceleration. For me, it's worth the $11 ($18 shipped from Ron Ayers), and since its cheap and an easy install, I'm putting it on my 12k service list. :2tup: __________________ Prudent riders live longer than moron riders. Login or Register to Remove Ads
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09-07-2008, 09:08 PM	#7
Sarris Senior Member Join Date: May 2007 Location: New Port Richey, Florida USA Posts: 1,348	Re: Bad Drive Sprocket Rubber If you can move the sprocket & hub (via the chain) 1/4" or more before it hits the rubber inside, it's worn out. You'll be amazed how smooth it rides after replacement. It's also easy to replace. You don't need to fully remove the wheel, just remove the axle, drop down the wheel, slide the sprocket hub out, and replace the hub shock absorber (aka cush drive rubber) paying attention to the alignment within the wheel hub. Check out the parts manual for an exploded view. __________________ Prudent riders live longer than moron riders.
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