FZ70S Crankshaft - Precision YSG1015 Replacement for FZ70S by YS Engine  [YSG1015]

Replacement Crankshaft for FZ70S Engines

This component is the spare part listed under YS Engine YSG1015 for the FZ70S engine range. It serves as the rotating assembly that translates piston travel into output torque on model engines and is intended for hobby use only.

Designed as a like-for-like replacement, it reinstates correct crank geometry and bearing seating during overhaul, helping to eliminate play and restore timing accuracy. The unit is shipped as a single service part for workshop repairs.

Fitting requires careful disassembly and inspection of mating surfaces: verify connecting rod clearance, check bearing seats, follow the engine maker's torque figures, and confirm bearing alignment. After installation, run the engine gently for break-in before full-throttle use.

Replace the crankshaft during a full rebuild of an FZ70S and follow standard bearing and seal renewal practices for best results.