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Old 13-01-14, 23:36
WeaveMcQuilt WeaveMcQuilt is offline
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Join Date: Jan 2013
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Rear Sprocket Hub disintegrating?

So, I'm doing my chain and sprockets today.

Haven't taken the sprocket carrier off in around 7,000 miles, I did take the rear wheel off for greasing before winter so I was expecting to see the cush drive rubbers a bit ******ed.



Actually, apart from separation, they don't look too bad. Packing them out with rubber really does its trick!

Going to change them anyway. New ones from AJ Sutton.



Well, as you expect, inside the sprocket hub is some horrible baked on rubber (*should have cleaned this out when I changed them last time!)

BUT also, what appears to be a crusty metallic residue.




It's all over the bearing, and inside the hole where the sprocket carrier meets the hub.

Some scuffing on the hub here:




So, it's cleaning up OK. Got the paraffin out and a toothpick for that baked on crud




But this metallic residue and wear does slightly concern me.
Any ideas?

I wouldn't have thought the movement of the sprocket carrier in the hub can create this sort of friction... There isn't enough movement with the cush drive all packed out.
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Bike: 2013 XT660Z, TKC70 tyres

Mods:
Barkbusters, Scottoiler, DIY Tail Mod, DNA Stage 3, Power Commander V & O2 Eliminator, Exan X-Black Stainless exhaust, Tool tube, Ohlins linear front fork springs, Nitron rear shock, JT front and Supersprox rear sprockets, D.I.D. VX 520 chain, Adventure Spec bashplate, DIY USB Outlet, DIY chain guide, Kev's Throttle mod

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