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Just put bycycle tube in mine today doubled up. I read on here to use cable ties to help squeese the hub and sprocket together and this really helped. I tied on 4 over the spocket (not over teeth) and round a coupled of crossed spokes. These kept it nice and clamped together and enabled me to get the wheel back in and those anoying spacers which drop out easily only caused me a little problem. Went for a test drive and much smoother with no jolting anymore. A good fix. Cheers Kev

Nice work. :eusa_clap:

Bringing back an old thread, I just did this "mod" to my 2005 XT660R (like 9,000 miles on the clock). The vibration had got annoying, so I went to a tire shop and got an old, used, car tube (15x7.00) for $1USD :D

The thickness was perfect, didn't had to double it up. The result is amazing! I guess that as they deteriorate progressively you don't notice how bad they are until you fix them. I dreaded speeds over 100km/h on my bike due to the vibration, and I even thought there was something wrong with my bike... Until one day I had a flat tire and noticed that the sprocket carrier was lose, when new (I had another flat tire with less than 1K miles) I noticed that it was a tight fit, you could turn over the wheel and the sprocket carrier would remain in place, now with the rubber pieces in there it's back to the same tight fit!

What do you think about use of silicone grease when mounting new dumpers? Is it helpful for their life?
Also, dumper for xt600 has same yamaha part number as for xt660 and they are cheaper. Are they really same (fastriders.de)?

Quote:

Originally Posted by Kev (Post 99604)

There is a a Kev mod already for this problem I did mine this past Monday after getting a puncture. You only get around 5000 miles out of a new set of rubbers they become compressed then start to break up, the excess movement allows the rubber to twist & this causes them to break up, the sprocket carrier then has lots of free play, which makes the bike surge & feel snatchy at low speeds. Once they have become compressed they don't really shrink much more, so the free play needs to be taken up.

My fix is very simple, I have never needed to replace the dampening rubbers on any of my XT's even with my last XT doing over 20K miles.

If the rubbers are in tacked & not breaking up you can take up the free play using a inner tube rubber strips. By cutting 4 strips & laying them over the dampener rubbers then push the sprocket carrier into the wheel hub, this will fold the rubber strips in half & rap them around the sprocket holder & between the rubbers. You cut each rubber strips to size so they can rap over the sprocket carrier to size. You can use different thickness rubber tubes or double them up to take up the free play, go to a bike shop & get an old inner tube from them. You want the rubber strips tight, you need to apply alot of pressure to get the sprocket holder to into the wheel hub, using both hands push like hell on the sprocket from side to side & the rubbers will fold in half & slip between the rubbers & go together. Do not use any lube to get it together, the lube will damage the rubbers.

I would recommend one to do it around 3500 miles so the rubbers are still in good condition & you will never need to replace them & you will always have a tight sprocket Holder.

Kool ..I will be trying this one..

I think mine has had it - 7200 km

I've done the tube inserts twice already, and again today, there must be a permanent solution for this problem

http://i806.photobucket.com/albums/y...ers/Cush01.jpg

http://i806.photobucket.com/albums/y...ers/Cush02.jpg

Quote:

Originally Posted by cca (Post 154701)

I used rubber grease on mine, and so far there hasn't been much more degradation of the rubbers over 3000 km or so.

Quote:

Originally Posted by Dual (Post 166339)

Blimey, they look in good condition compared to the ones I'm running!

Mind you I have packed them out and they are working well with no vibration whatsoever. I'll get a few more miles out of them yet and then next year I have a cunning plan and it involves .....................

I'll tell you guys next year.:occasion14:

Ive thought of the possibility of pouring some sort of molton plastic or rubber in there and then re-assembling before it sets?

Or just glueing it all together with chemical metal? :eusa_wall:

Theres got to be some sort of solution

IMHO the only realistic long term solution is to get a firm to make up a batch of polyurethane ones like these (GXR1000/Hayabusa)...

http://www.brocksperformance.com/ima...sh_Drive_2.jpg

I've already tried three companies in the UK and all have shown either a lack of interest or "that's out of our scope of manufacturing"! Maybe someone can try and make some enquiries abroad? I'm sure there would be a sufficient level of interest in such a product here on XT660.com?