FZ70S Disc Valve Pin Replacement - YS Engine YSG1046  [YSG1046]

Replacement disc valve locating pin for FZ70S

This disc valve pin is a direct replacement accessory intended for RC-scale disc valve systems marked FZ70S. It functions as the locating pin that secures the disc valve assembly and maintains correct valve alignment during operation.

Fitment and role: Made for the FZ70S disc valve configuration, the pin keeps the valve disc seated and aligned so throttle response and engine breathing stay consistent. It is a small service part that supports reliable disc valve behaviour without changing the engine's tuning by itself.

Installation notes: Remove the engine's required covers to reach the disc valve assembly, take care when extracting the old pin to avoid damaging the valve disc or housing, and push the replacement in with controlled pressure for correct seating. Use basic hand tools and keep fasteners and sealing surfaces clean before reassembly.

Tuning and maintenance: Replacing a worn or bent pin is part of regular upkeep; a properly seated pin helps ensure repeatable valve timing and prevents erratic throttle response. Inspect the valve face and seating surfaces when servicing the pin, and confirm the disc moves freely after installation.