Crankshaft Puch 2 vxl engines, 12 mm piston pin, High quality crankshaft final checked and fine calibrated (aligned) in Sweden.

High quality crankshaft final checked and fine calibrated (aligned) in Sweden. Alignment, (balance between halves, picture 3 ): max run out = <0,03/side. In weight ratio very well balanced crankshaft for optimal function and very little vibration, especially when used with NTS pistons. Supplied complete with needle bearing for piston pin. Technical data: Needle bearing: 12x15x14 (for 12mm piston pin) (10581) included Cone for flywheel: Taper 1:5 (input diameter ~12mm) Thread flywheel side: M10x1 Thread transmission side: M8x1 Cross key, flywheel: 3×3,7 (10841) Not included Stroke: 44mm (49cc) We have noticed that on some engines, probably only the hand-shifted ones before the piston engine, the material in the crankcase may need to be ground down slightly. Try with the crank and piston/cylinder mounted in one half before you assemble the engine and you will see if it applies to your engine. It is the connecting rods that may be affected.