YS Engine YSG1046 FZ70S Locating Pin Replacement  [YSG1046]

FZ70S locating pin overview

This pin is supplied as a replacement for RC disc valve assemblies marked FZ70S. It acts as the locating element that holds the disc valve assembly in position and preserves correct valve alignment during running.

Role and fit: Specifically matched to the FZ70S disc valve setup, the pin helps the valve disc remain seated and correctly aligned so throttle feel and engine breathing remain predictable. It is a maintenance spare rather than a performance modifier.

How to install: Access the disc valve assembly by removing the necessary engine covers, gently extract the old pin while protecting the disc and surrounding housing, then insert the new pin with steady pressure to ensure it seats properly. Keep tools basic and work surfaces free of grit before reassembly.

Maintenance tips: Replace bent or worn pins as part of routine checks; a correctly seated locating pin supports repeatable valve timing and reduces the chance of inconsistent throttle characteristics. Inspect seating faces and confirm unimpeded disc movement after replacement.