Crankshaft SCHMITT Drehfreund 44mm stroke, 85mm conrod, 80-110cc, Simson S51, S70, S83, M5

Schmitt “Drehfreund” crankshaft for racing and engines with high peak power. This premium crankshaft has a 44mm stroke and an 85mm CNC-machined forged connecting rod. Schmitt defines the application range of this crankshaft as Big Bore engines with 80-110cc displacement, suitable for Simson S51, S70, S83 with M500 and M700 engine cases.

• fits from 80cc to 110cc displacement.
• optimized pre-compression for a wide torque band, narrower cheeks compared to the steam hammer version STT49363
.
• optimal balance factor of 65%
• High strength, yet lightweight (.
• Larger silver plated piston pin bearing 12x17x15mm for 12mm piston pin included
.
• The upper and lower needle bearings are optimally lubricated by several extra large holes in the connecting rod
• Expanded crankshaft stub on the clutch side for an optional 3rd crankshaft bearing
• Lower guided connecting rod with reinforced interference fit and larger connecting rod eye
• Lighter than the original crankshaft
• Rotation speed resistant >15,000 rpm
• manufactured from 14NiCrMo13 steel
• Developed in Germany- manufactured in Europe

44mm stroke, 85mm conrod, 80-110cc, Simson S51, S70, S83, M500, M700