YSF2013 Intake Tappet Adjusting Screw - compatible with YS Engine models by YS Engine  [YSF2013]

Fine-thread intake tappet screw for YS Engine applications

This YS Engine YSF2013 intake tappet adjusting screw serves as a direct replacement to correct or refine intake tappet clearance on YS Engine units. It is a purely mechanical valve-train part that lets you make small, consistent changes to tappet position for reliable engine behaviour.

Installation is simple for those experienced in RC engine maintenance: remove the valve cover as per the engine service instructions, remove the old adjuster, install the YSF2013, and set the clearance using feel or a standard feeler gauge when appropriate. Always adhere to the engine manufacturer's recommended torque and reassembly sequence.

During tune-up or competitive prep this adjuster helps maintain repeatable clearance checks and minor timing consistency. Check thread condition and seating when fitting, and perform a bench run to ensure steady idle and proper throttle response before putting the engine back into service.