Race crankshaft long stroke 48mm - for Simson S51, KR51/2 Schwalbe, SR50, MS50, S53, S70, SR80, S83

Racing crankshaft long stroke 48 mm With our new long-stroke crankshaft, we are expanding our product range for Simson with another highlight. In the completely newly manufactured crankshaft, we were able to realize many constructive advantages over a subsequently converted Simson crankshaft. The crank bolsters, which are each 1 mm wider, are used to lay the foundation for optimal balancing and higher stiffness (stronger press fit). With the help of the pressed-in aluminum plugs and the lighter connecting rod, the balancing is precisely adapted to our S85 pistons. This results in low-vibration engine running, increased rotational ability and longer bearing life. For the storage below, we rely on a high-quality, silver-plated needle bearing (13 mm wide) with silver-plated thrust washers. This means that the upper thrust washers in the piston can be omitted and a 16 mm wide needle bearing can be accommodated. Technical data: - connecting rod length 85mm - wider crank bolsters (per cheek +1 mm) - wider and stronger press fitting of the crankpin - guided, simplified connecting rod with additional lubrication grooves - wide, Silver-plated needle bearing (13 mm) + silver-plated thrust washers on the crankpin - wide upper needle bearing (16 mm) - balancing optimal for our S85 piston - reduction of the crankcase dead room Scope of delivery: - ZT racing crankshaft long stroke 48 mm - 16 mm needle bearing for piston pin - ignition spring + clutch