REAR BRAKE DRUM & SPROCKET (CUSH DRIVE)

Hi All.
The rear brake drum, i can see it from the sprocket, doesnt turn circular but a little bit eccentric.
What i must check?.
Thanks.
Piero

sounds like the bearing, or maybe its one of those Indian sprocket/drums. Can you move the sprocket sideways?

Not sure if you mean on the bike or off . If on the bike try this....with the axel only just snugged up , turn the wheel & apply the brake & adjust until all is well , then tighten the axel fully . Works for me .