Crankshaft Schmitt Drehfreund 44Mm Stroke / 85Mm Connecting Rod / 80-110Cc Simson S51 / S70 / S83 / M500 / M700

racing Crankshaft Schmitt Drehfreund for Simson Reinforced tuning crankshaft Schmitt "Drehfreund" for Simson S51, S70, S83 with M500, M700 engine case. Schmitt defines the range of this crankshaft for engines from 80 - 110cc displacement. Features crankshaft Drehfreund The precisely manufactured crankshaft made in Germany has 44mm stroke with 85mm connecting rod. The lightweight, polished connecting rod (70g) is supplied with a high-quality, silver-plated small end bearing. The upper and lower needle bearings are optimally lubricated by several extra-large holes in the connecting rod. The materials are of very high quality and the production is precise. All critical points have been sufficiently reinforced to ensure smooth running and optimum rigidity even at high engine speeds. Concentricity deviation and bearing seat fit comply with the latest measurement and manufacturing standards. The pre-compression is optimized and ensures a wide torque band. And another treat for tuners: on the clutch side, the crankshaft stub has been extended to allow the installation of an optional 3rd crankshaft bearing. The crankshaft runs noticeably smoother than original crankshafts, even at high engine speeds. The Drehfreund crankshaft from Schmitt is suitable for both original setups and powerful, high-revving tuning engines. Specifications Simson crankshaft Drehfreund: Crankshaft made from 14NiCrMo13 steel Lighter than the original crankshaft Optimized pre-compression for a wide torque band, narrower webs compared to the steam hammer version STT49363 Balance factor: 65% Stroke: 44mm Connecting rod length: 85mm Larger, silver-plated small end bearing 12x17x15mm for 12mm piston pins High-strength, lightweight forged connecting rod with larger connecting rod eye and extra-large lubrication holes Extended crankshaft stub on the clutch side for an optional 3rd crankshaft bearing Bottom-guided connecting rod with reinforced interference fit and larger connecting rod eye RPM-resistant up to 15,000 rpm For big bore tuning setups 80 - 110 ccm Suitable for S51, S70, S83 with M500, M700 crankcases