Cam Gear Cover Screws for YS 120/140 Engines - YS Engine YSF1234  [YSF1234]

YS 120 and 140 cam cover screw set

This screw set fits the cam cover assemblies used on YS 120 and 140 engines and is intended as an aftermarket replacement for those fasteners. The screws secure the cam gear cover, help keep correct gear mesh, and prevent unwanted cover movement during normal running and tuning operations.

Fitting is simple for those familiar with small RC engines: remove the cam cover, check mating faces and thread engagement, then hand-start screws to confirm alignment before tightening. Use an appropriately sized hex driver, apply even light torque, and take care not to over-tighten to avoid damaging the cover threads.

During tuning and maintenance these screws assist with repeatable assembly and timing checks. Correctly tightened cover screws help maintain stable cam timing, reduce oil seepage risks at the cover seal, and make future disassembly easier; inspect threads and torque after any cover work.