I have a 1976 Ossa MAR 250 with a broken crankshaft (just the spring part on the left hand side has snapped).
Q1: Are all classic Ossa 250 crankshaft parts interchangeable?
Q2: Does anyone out there have any spares?!
I had the motor re-built and it was never started...now the crankshaft has broken...

Everything else is finished...
Stuart