crankshaft Schmitt "Dampfhammer" 44mm stroke, 85mm con-rod for Simson S51, S70, S83, KR51/2, SR50

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Crankshaft Schmitt "Dampfhammer" for racing and engines with high peak power. This premium crankshaft has 44mm stroke and a 85mm CNC machined forged connecting rod. Schmitt defines the range of use of this crankshaft on Big Bore engines from 50-75cc displacement suitable for Simson S51, S70, S83 with M500, M700 engine housing.

The technical highlights at a glance:

• optimized pre-compression for a wide torque band, suitable from 50cc to 75cc displacement
.
• optimal balance factor 65%
• High strength, yet lightweight (<70g) forged connecting rod- CNC machined, for large 17mm needle bearing on piston pin
.
• Larger silver plated piston pin bearing 12x17x15mm for 12mm piston pin included
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• 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
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• Lower guided connecting rod with again reinforced interference fit and larger connecting rod eye
.
• 10-15% heavier than stock crankshaft
.
• Rotation speed resistant >15,000 rpm
• manufactured from 14NiCrMo13 steel
• Developed in Germany- manufactured in Europe