MZ/MuZ Riders

Hi I am looking for a Mz ts125 bolt that fit's into the crank and holds the sprocket on . 1981 bike . Any help at all please ?.
Thanks .
Mike.

Nope, it's a reverse threaded nut that holds the sprocket onto the gearbox output shaft. I was fed up with all my ones unwinding. So I used a wormdrive ( jubilee clamp) to hold on the sprocket. Worked fine. But If left to its own devices. It unwinds and the chain or sprocket (or both!!!!!!!) ruins the clutch pushrod and clutch mechanism.
Sorry, only bolt that fits on the right hand side of the crank, holds on the little lobe that the contacts sit on. Do you mean this?

Puffs your right, I think they mean the left hand side. The sprocket that drives the hi-Vo chain to the clutch and gearbox. Hope they haven't stripped it, as they're a pain in the hole to remove. Luckily my mate used to have full workshop facility's. As he worked for Scotbike/Rightline Kawasaki in Glasgow.