{"product_id":"stt49351-albero-motore-schmitt-drehfreund-44mm-corsa-85mm-biella-50-75cc-simson-s51-s70-s83-m500-m700","title":"STT49351 Schmitt Drehfreund crankshaft 44mm stroke \/ 85mm connecting rod 50-75cc Simson S51 \/ S70 \/ S83 \/ M500 \/ M700","description":"\u003ch2\u003erennSchmitt Drehfreund crankshaft for Simson\u003c\/h2\u003e\n\u003cp\u003e Schmitt \"Drehfreund\" reinforced crankshaft for Simson S51, S70, S83 with M500, M700 engine housing. Schmitt defines the application range of this crankshaft for engines with displacements between 50 and 75cc.\u003c\/p\u003e\n\u003ch3\u003e Crankshaft characteristics\u003c\/h3\u003e\n\u003cp\u003e The crankshaft, precision-crafted in Germany, has a 44 mm stroke and an 85 mm connecting rod. The lightweight, polished connecting rod (70 g) is equipped with a high-quality, silver-plated piston pin bearing. The upper and lower needle bearings are optimally lubricated by several extra-large bores in the connecting rod.\u003c\/p\u003e \u003cp\u003eThe materials are of the highest quality and the manufacturing is precise. All critical points have been sufficiently reinforced to ensure smooth operation and optimal rigidity even at high speeds. The concentricity deviation and the bearing seat fit comply with the latest measurement and manufacturing standards. The pre-compression is optimized and guarantees a wide torque band.\u003c\/p\u003e\n\u003cp\u003e Another tuning tidbit: On the clutch side, the crankshaft stub has been lengthened to allow for the installation of an optional third crankshaft bearing.\u003c\/p\u003e\n\u003cp\u003e The crankshaft runs significantly smoother than stock crankshafts, even at high revs. Schmitt's free-spinning Drehfreund crankshaft is suitable for both stock setups and powerful, high-revving tuned engines.\u003c\/p\u003e\n\u003ch3\u003e Simson crankshaft Drehfreund specifications:\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003e Crankshaft made of 14NiCrMo13 steel\u003c\/li\u003e\n\n \u003cli\u003eLighter than the original crankshaft\u003c\/li\u003e\n\n\u003cli style=\"list-style-image: url('boxen\/bullet.gif');\"\u003e Optimized pre-compression for a wide torque band, narrower cheeks than the hammer version STT42038\u003c\/li\u003e\n\n\u003cli\u003e Balance factor: 65%\u003c\/li\u003e\n\n\u003cli\u003e Stroke: 44 mm\u003c\/li\u003e\n\n\u003cli\u003e Connecting rod length: 85 mm\u003c\/li\u003e\n\n\u003cli\u003e Larger pin bearing, silver, 12x17x15 mm for 12 mm pins\u003c\/li\u003e\n\n\u003cli\u003e Lightweight, high-strength forged connecting rod with larger rod eye and extra-large lubrication holes\u003c\/li\u003e\n\n\u003cli style=\"list-style-image: url('boxen\/bullet.gif');\"\u003e Extended crankshaft stub on clutch side for optional third crankshaft bearing\u003c\/li\u003e\n\n\u003cli style=\"list-style-image: url('boxen\/bullet.gif');\"\u003e Bottom-guided connecting rod with reinforced interference fit and larger connecting rod eye\u003c\/li\u003e\n\n\u003cli\u003e Resistant to speeds up to 15,000 rpm\u003c\/li\u003e\n\n\u003cli\u003e Suitable for 50cc to 75cc engine sizes\u003c\/li\u003e\n\n\u003cli\u003e Suitable for S51, S70, S83 with M500, M700 engine housing\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"Billaricambi SRLS","offers":[{"title":"Default Title","offer_id":55462228394308,"sku":"STT49351","price":211.83,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0856\/3730\/0548\/files\/665589_6072558.jpg?v=1755852079","url":"https:\/\/www.billaricambi.it\/en\/products\/stt49351-albero-motore-schmitt-drehfreund-44mm-corsa-85mm-biella-50-75cc-simson-s51-s70-s83-m500-m700","provider":"Billaricambi SRLS","version":"1.0","type":"link"}