Crankshaft, connecting rod assembly for MBK 51 / av10 motobecane

Here you will find complete crankshafts for MBK 51 / MOTOBECANE AV10. Basically, there are only two types of crankshafts for MBK 51. The crankshafts with a "right-hand thread" which is screwed to the right, and the "left-hand thread" with the ignition nut which is screw to the left. The original crankshaft has a stroke of 41.8mm and a connecting rod of 85mm. As standard, the MOTOBECANE AV10 and AV7 connecting rods are designed for a Ø13mm piston pin. MALOSSI and RRD have released crankshafts with long strokes, by offsetting the crankpin, the piston descends lower and rises higher so as to increase the engine displacement! There is no long connecting rod on the MBK 51 because the length of 85mm is more than enough even for engines prepared with long strokes and / or large diameter pistons.