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

Durable cam cover fasteners for YS 120 and 140

This set of cam gear cover screws is intended for use with YS 120 and 140 engine cam cover assemblies and serves as a like-for-like replacement for the original fasteners. The screws keep the cam gear cover secure, preserve correct gear mesh, and reduce the chance of cover movement under typical running and tuning conditions.

Installation follows standard small-engine practice: remove the cam cover, inspect the mating surfaces and thread engagement, then fit screws by hand to check alignment before applying final torque. Use a suitable hex driver that matches the head, tighten evenly and avoid over-torquing which may damage the lightweight cover threads.

For ongoing maintenance and tuning the screws play a small yet important role. Correctly tightened cover screws support consistent cam timing after adjustments, help limit oil seepage at the cover seal, and make subsequent disassembly straightforward; verify torque and thread condition whenever the cover is removed.