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-   -   Finally: Cush drive cure? We need your help! ( https://www.xt660.com/showthread.php?t=23738)

Warheart01 10-04-15 17:52

Voted yes if they come in the 50� range.

While I'm at it I would like to ask you all a question about cush drives, but I don't see the need to open a whole new topic.

My XT is my first bike so I'm still learning alot and recently discovered I probably need to change the cush rubbers, I don't know if they ever have been changed by any of the previous owners and the bike has done around 9500 miles. Yesterday I rocked the sprocket back and forth and noticed a play of around 1-2mm, but since I'm a noob it doesn't tell me much if it's on the better or worse side, anyone care to weigh in? :) Thanks!

Desert Racer 10-04-15 21:57

Quote:

My XT is my first bike so I'm still learning alot and recently discovered I probably need to change the cush rubbers, I don't know if they ever have been changed by any of the previous owners and the bike has done around 9500 miles. Yesterday I rocked the sprocket back and forth and noticed a play of around 1-2mm, but since I'm a noob it doesn't tell me much if it's on the better or worse side, anyone care to weigh in? Thanks!
I would be inclined to replace the Cush drive rubbers & perform the Kev Cush drive mod just for peace of mind. It's one of the more easier jobs to do, so would also get you more acquainted with you bike.
It may be worth considering if you are due for a tyre or chain & sprockets to while you have the wheel off.

66T 11-04-15 09:11

Quote:

Originally Posted by dommiek (Post 208712)
Good point Steve. I'm interested in a set but they must still have an element of "softness" to them. The idea is to cushion the drive and not make it so direct (like on XR's) or the chain and sprockets will wear in no time.

I agree with this sentiment, though I don't know that the chain and sprockets would suffer as much as the gearbox if the 'rubbers' were too hard. Especially if those owners who try to torque the 660 around the place (instead of revving it freely) use dampers which are too dense.

I've used rubber belting to space my originals out, and so far they're fine. But they've only done about 23,000 km.

Pleiades 11-04-15 11:36

I also agree that the choice of polyurethane shore hardness should not err too far into the hard end of the range. Ideally it wants to be similar to the OE rubbers in terms of damping. We don't want them to be any harder really, just to last longer.

I suspect that Hunday's ones that I have fitted maybe slightly on the hard side? They've only been on for about 5K miles, so can't really pass comment on chain wear.

Chrissybb 18-04-15 17:14

Cush drive
 
When are these Cush drive replacements available because the standard one are s***e I have packed them with rubber but don't last long please hurry up and make them available please why oh why has Yamaha not solved this issue its a shame on them

Emilia 01-05-15 16:50

I agree that it is a great idea at the right price.
I'm about 40 miles away and would be happy to visit for a free set. I'm off to tour Scotland soon, so I could get around 2-3,000 miles put on them over 2 weeks if that is any help.

greatescape 01-05-15 21:50

Hi Emilia, hope you're going to post some pics of your Scottish tour! Steve

dommiek 01-05-15 23:08

I've been thinking about this cush drive problem over the last few weeks and think we're maybe barking up the wrong tree.

Replacing the cush drives, packing the gap out or fitting harder rubbers is simply treating the symptom, not the cause; similar to constantly putting a plaster over a wound that won't heal.

I inspected the cush drive rubbers on my new 2015 Tenere 4 weeks ago and was shocked to find them starting to "disintergrate" with only 250 miles of use. I found about 2mm of free play but more worrying was the slithers of rubber that had been "rubbed off" the cush drives. I can only think there must be a lot of movement with the sprocket carrier moving in the hub against the cush drive rubbers.

Perhaps the solution is to do the mod and add a second bearing to stabilise the sprocket carrier thereby reducing or eliminating excess movement and friction.

I'd be interested to hear from members who have made the second bearing mod if they have noticed any reduction in the cush drive rubbers wearing??

Incidently, I refitted the sprocket carrier and covered the cush drive rubbers in Michelin bib mousse lubricating gel (this is used to lubricate mousses fitted to off road tyres) I'm hoping this will reduce the friction and wear in the cush drives therby prolonging their life.

sweller 23-05-15 19:08

Any news?

Geoffdl99bt 24-05-15 19:27

Hi All 19000 miles on the same Cush drive rubbers but with the rubber sheet inserts. I have bought several differ thicknesses of rubber to try to what effect it has on the ride quality. What I would say is that when packed tight hence little movement the ride through the drive chain was quite harsh and I was concerned that the chain and gearbox were getting a hard time



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