YS Engine YSG2049 Precision Disc Valve Pin Set Screw for FZ115S  [YSG2049]

Description and fitment notes

The YS Engine YSG2049 disc valve pin set screw secures the disc valve pin on YS FZ115S disc valve engines and functions as a replacement fastener for maintenance and reassembly tasks. It is intended for use on model aircraft and compatible RC platforms running the FZ115S engine.

Its purpose is simple: provide secure threaded retention so the valve plate and associated components maintain correct indexing during operation. When replacing or servicing the assembly, ensure the screw is fully seated and that the valve plate alignment is correct prior to final tightening.

Fitting instructions: follow the engine manual to access the disc valve area, position the disc valve pin, insert the set screw and tighten by hand before finishing with the appropriate driver until snug. Avoid excessive torque and check that the disc valve plate moves freely after installation. Keep spare fasteners for routine servicing.