BOYESEN competition valves with pipe for MVT G4 crankcases, YAMAHA YZ 85 motorcycle from 2002 to 2024

The famous BOYESEN valves with their specific system for high-level ventilation and performance! Delivered with its pipe for KEIHIN PWK 28mm to 30mm carburetors! Bi-blade system offering maximum performance at both high and low revs!

For :

YAMAHA YZ 85 2T from 2002 to 2024

Competition machines with MVT G4 housings