Yoshimura RS-4 Stainless Slip-on Muffler 2014-18 Yamaha YZ/WR250F/X | 231012D320 F800GS For machines originally equipped with

For machines originally equipped with non-O-ring chains

We wound up with the 250 peak HP at 6

If you are looking for a goggle with a quick lens change system

Self-cleaning mud grooves to prevent dirt build up

Today you will find one behind the front number plate of many top level national pros (this includes Ryan Dungey)

Yoshimura RS-4 Stainless Slip-on Muffler 2014-18 Yamaha YZ/WR250F/X | 231012D320 F800GS For machines originally equipped withFitment: Yamaha WR250F 2015 2018 Yamaha YZ250F 2014 2018 Yamaha YZ250FX 2015 The work that went into developing the RS 4 muffler has paid big dividends in Off road Racing; winning multiple Supercross and Motocross titles since it's inception. We've developed the current generation RS 4 based on that research & development, and the result is a unique design that provides an unrivaled combination of power and quiet exhaust tone. The RS 4 features a