In theory, there are two basic designs here.
1: Big nut with a locking tab to absolutely hold the sprocket tight and in place
2: loose sprocket, with a bit of metal and two bolts to keep the sprocket from coming off.
My experience has been that if you have type 1, the nut should be TIGHT always, as the shaft splines will wear excessively if not. With type 2, I believe the shaft is harder, and the sprocket heat treating may be less in the center, so that it wears and not the shaft.
To get the big nut tight, first step is to make sure that it's tight up against the splines by rotating the rear wheel backwards, so that under acceleration the sprocket is tight against the splines so LESS likely to TRY to loosen the nut. Less force under deceleration. Then make sure the nut is tightened to FACTORY SPEC torque not just an air gun which may or may not do the job. Then bend the tab washer over thoroughly, tightly, and it should be tight forever.
Others may well have different experiences!
__________________
Grant Johnson
Seek, and ye shall find.
------------------------
Inspiring, Informing and Connecting travellers since 1997!
www.HorizonsUnlimited.com
|