chain jumping when in gear...

[Dangle_kt]

right - the plot thickens


I was merrily testing the chain tonight with a set of pliers, rotating each link and found no tight links... BUT


I did find something else!


As I was rotating the link it was pulling the chain tighter, and there was a noticeable DONK noise - after further trial and error its seems like when the chain is under tension the rear wheel MOVES ever so slightly.


I thought it was bearings, but when I grasp the rear wheel and try to twist it (hands at 12/6, or hands at 3/9 oclock) it doesn't budge - but if I pull the entire wheel towards me it does move fractionally and makes the noise.


I thought it might be the swingarm moving, but its not - its definatly the wheel.


So essentially what is happening is the chain (when under load) is pulling the wheel around making the clonk noise and messing up the chain alignment fractionally.


So my question to you guys before I strip it is - what could it be?


I'm concerned I'll strip it and not find anything obvious as it is not THAT much play.


Few options I'm unsure on - cush drive? wheel spacer issue? Bearing issue that hasn't shown up any normal play?


Thoughts anyone?


thanks