YS Engine Cylinder Head Screw Set YSF5110 for FZ53 and FZ63  [YSF5110]

Cylinder head fastening kit

This kit supplies replacement screws intended specifically for the YS FZ53 and FZ63 cylinder heads used on model engines. The fasteners are provided for head removal and refitting during maintenance, gasket replacement, or tuning operations.

Use only with the indicated YS FZ53 and FZ63 head assemblies. The parts are direct replacement fasteners to recover secure clamping between the head and crankcase on compatible model engines.

When installing, inspect the holes and threads for wear, clean the mating surfaces, start each screw by hand to prevent cross-threading, and torque gradually to the engine maker's recommended figures. Correct installation aids consistent compression and repeatable adjustments.

This is a small hobby accessory for model engine care and tuning and is not intended for use on full-size engines or non-RC equipment.