Tuning crankshaft for Zündapp M25 / M50 Bergsteiger

Crankshaft for Zündapp (full crankweb), suitable for M25 and M50
The crankweb-design results in a smoother running and due more pre-compression tomore power output
Caution:This crankshaft is not legal and a remainder of stock for an unknown Zündapp type.
The crankshaft fits exactly in M25/M50 engines, but the installation leads to the termination of the operating licence, so do not use it on public roads!
Because of the old age the shaft is without guarantee!
Sizes: shaft length at magnet wheel: 65 mm, at clutch: 41 mm, diameter at clutch side: 15 mm, for 10 mm turned down to 12 mm, thread length: 14 mm, 10 x 1 mm right-hand thread, connection rod piston pin bore: 15 mm, external distance crankwebs: 30 mm