BOYESEN competition valve slats 125cc 2-stroke YAMAHA DT, DT R, DT RE 125cc and 200cc from 1987

Here are the BOYESEN valve slats for YAMAHA DT, DTR, DTRE,… 125cc and 200, beware, these slats can only be fitted on models after 1987. These competition valves will allow you a very good gain in power both in terms of torque and 'at high speed. The patented BOYESEN system uses 2 slats on each side!

A thinner for the torque (resonant frequency at low speed) and a very rigid for high speeds (frequency in very high speeds). These valves are delivered with an ultra complete manual (carburettor adjustment etc etc,) Stops special blades removed and stickers.