Cush drive
 

How can you take up the play using rubber tubes.
Having changed my chain and sprockets today I noticed there is a bit of play with the rear sprocket and wheel.
After 12000miles I would assume it may be the Cush drives:smilies

Think there is an official kev mod description but heres a link.

http://www.xt660.com/showpost.php?p=113529&postcount=1

if you do a search there are a few threads about this
you basically cut lenghts of inner tube lay them over the rubbers and push the sprocket carrier back on so it wraps around the lobes
think its about �20 for the set from yamaha for that amount id just replace em

Thanks for the advice

Yes, but before ye push all day to get the sprocket carrier to wedge itself in...liberaly spray the rubbers wi WD40....it`l squeeze in nicley...:blob10:

its �36.50 for the lot, i replaced mine yesterday.

ye could have saved yersel 36.50.. an cut up an old tube...everyone does it,, an it makes it as new...

just ordered mine today too �36 forgot there was 4 bits to it, why do they ask how many you want as if you'd ony replace 2 ?

mine also has too much play to be taken up with tube bits,
i expect them to be rock hard and in lots of little bits from the play i've got, the chain is too tight too which isn't helping, bike has 10k on it and as far as i know they are original :sad11:

Why do assume this is a bad thing? Is there supposed to be a little "Give" in this area.

cush drive
 

Done the Kev Mod on mine a week ago and its great . Wish i had done it sooner !

Good advice. I learnt the hard way and struggled for ages getting the wheel and spacers inbefore resorting to silicone spray, then it was easy. Definately a good mod and both easy and worth doing.

just ordered a set from wemoto 21 squid :-)

Has anyone tried putting some grease on the rubbers before putting the sprocket carrier back on ? im thinking a bit of lubrication may help the life of cush drive ? just a thought.

Maybe silicon grease. I haven't try.... yet.

Grease destroys the rubbers, use talcum power or soap if you want to add lube.

I have heard that silicone/teflon grease is safe. This is an article, but...


DuPont� Teflon� Silicone Lubricant
A clean, light duty lubricant. Excellent for non-metal materials that may be damaged by conventional lubricants. Helps prevent sticking, binding and freezing.

• Formulated with DuPont� Teflon� fluoropolymer to outperform other silicone sprays in both metal and non-metal applications
• Clean, non-staining and odorless
• Waterproofs, protects, lubricates and preserves
• For use on rubber, plastic, vinyl, leather, metal and wood
• Eliminates squeaking and binding in windows, hinges, locks, etc.
• Helps prevent rust, oxidation and corrosion on all metals
• Protects o-rings, fishing gear, tools and farm equipment from salt, chlorine and corrosives
• Helps prevent snow sticking and muddy buildups on shovels, snow blowers, wheel wells, etc.

For what it's worth, I use rubber grease on mine. I realise the 'rubbers' probably aren't, but the grease works very well anyway. It has all but stopped the friction degredation (ie crumbling) I found after the first time I pulled the hub apart.

I thought 1000km in dust, water and so on might have caused a buildup of goop attracted by the grease, but it was all pretty clean in there.

That was my thoughts, if they were lubed, then there would be less friction and so a longer lifespan. But maybe Yamaha would have thought of this ? might try the soap idea just to see what happens, i can just picture bubbles coming from my back wheel on a wet day though !!

Chain silicone lube, safe for o-rings or is it too optimistic?blowup

silicon should be fine. i use silicon on the rubberlocks on my seakayak for example. it protects the rubber against cracking, makes them seal to the kayak and even helps against ice on winter.

I have ordered some silicone grease on ebay, so i,ll give it a try.

Maybe KY jelly then as that is recomended for use with rubber! :042:

should you pack out new cush drive rubbers with tubes as a matter of course my new ones don't seem that tight ?

you can but try and get some motor tubes as they are stronger than bicycle ones but still flex. I'd just make sure to glue them in place as when you take the sprocket off all the bits go everywhere and it's hard to get them back in

Pity no-one makes poly cush drive rubbers. They would last forever.

Maybe rubber grease?...

Lithium Grease?
 

I've been using Lithium Grease for some time. I change over from a set of rims with D606s & Tourances regularly, and it does seem to have slowed down the wear of the rubbers... Is Lithium Grease OK with rubber?