FZ70S Crankshaft Upgrade/Replacement YSG1015 for FZ70S by YS Engine  [YSG1015]

FZ70S Crankshaft Service Part

Listed as YS Engine YSG1015, this crankshaft is the service spare for the FZ70S model engine family. It acts as the rotating core converting piston motion into usable output and is built for model-engine maintenance tasks.

Use it as a direct service replacement to recover bearing seats and crank timing when the original shaft is worn. The item is supplied as a single replacement piece for workshop-level rebuilds and repairs.

Standard overhaul steps apply during installation: disassemble the engine, inspect and replace worn bearings and seals, confirm connecting rod and crank alignment, and torque fasteners to specified values. Perform a measured break-in to validate smooth operation before normal running.

Choose this crankshaft when undertaking a rebuild of an FZ70S and follow proven rebuild steps for bearings and seals to ensure long-term reliability.