BOYESEN motorcycle Kawasaki KX 80, Yamaha YZ 80 and Yamaha YFS 200 BLASTER motorcycle seat covers from 1988/2006

Here are the slats of valves BOYESEN for Kawasaki KX 80, Yamaha YZ 80 and Yamaha Yamaha YFS 200 BLASTER of 1988/2006.

These competition valves allow you a very good power gain in both spas and high speed baths.

The patented BOYESEN system uses 2 slats on each side! A finer for the couple (resonance frequency at low speed) and a very rigid for high speeds (frequency in very high speed).

These valves are delivered with an ultra complete manual (adjustment carburetor etc etc,) Stops slats special removed and stickers.

Mounts on:

Off-road (mx) Kawasaki KX 80 - 1986/1987
Off-road Yamaha YZ 80 LC - 1987/1992

Off-road Yamaha YZ 80 / L - 1987/1992

Atv-quad Yamaha YFS 200 BLASTER - 1988/2006