PRO-178 BOYESEN REEDS, Boyesen Pro Series Reeds - PRO YZ 250 2000-2004

The Boyesen Pro Series Reed Set is a replacement reed petal set for Yamaha YZ250 two-stroke motocross models from 2000 to 2004. It is designed for use in the intake reed valve system, where it controls fuel-air flow into the engine and supports throttle response across low, mid and high RPM operation.

Features

• Direct replacement reed set for Boyesen Rad Valve applications.


• Dual-stage reed design for controlled intake response.


• Low-tension top reeds support immediate throttle response.


• Intermediate reed stage supports mid-range response and engine pull.


• High-tension base reed supports stability during high-RPM operation.


• Supplied as a set with two power reeds and six small pan head bolts.

Specifications

• Product type: replacement reed valve petal set.


• Construction: carbon fibre top reed with fibreglass/epoxy bottom reed.


• Reed design: dual-stage / multi-stage construction.


• Compatible Boyesen assemblies: RAD34H and RAD34I.

Cross-Reference OEM Part Numbers

• PRO-178


• PSR-178

Vehicle Fitments

• Yamaha YZ250, 2000-2004.