yamaha rd250f

[noonster]

im having problems with my gearbox drive sprocket,even tho i have fitted a new sprocket and tab washer.

when i tightened the nut up i still got movement in the sprocket, i have fitted the nut right way.

so either the sprocket is wrong and not the correct thickness

or the the tab washer is also to thin.

could anybody tell me what the small drive sprocket and tab washer thickness is should be please.


sprocket came from a bike shop in town,so could have supplied wrong one

thanks

[chrisg]

Have you got the old sprocket? I assume the spacer behind the sprocket that buts up to the bearing and seals the gearbox is the correct length.
Does sound like the sprocket is too thin if like you say that you have the correct nut with a recess.