Yoshimura RS-4 SS Full Exhaust Kawasaki KX250F 17-20 | 242930D320 CBR1000RR • The helmet’s shell construction

• The helmet’s shell construction utilizes a highly advanced molding technology with a multi-composite combination:

HONDA (05-07) CR  125 R & 250 R  2 stroke

and a standard compound on the sides for less knob-roll in the corners

Adjustable horizontally in two different positions

Easy bolt-on power

Yoshimura RS-4 SS Full Exhaust Kawasaki KX250F 17-20 | 242930D320 CBR1000RR • The helmet’s shell constructionFitment Kawasaki KX250F 2017 2020 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 Polyresonant duplex chamber and two staged