MSV Racing OptiFlo “phi” High Flow Impeller – Kawasaki KX125 (1991–2005)
Cool Smarter. Ride Harder. Dominate Longer.
MSV Racing brings its race-proven
OptiFlo “phi” High Flow Impeller technology to the legendary
KX125 two-stroke platform (’91–’05) — delivering
superior coolant flow,
enhanced engine cooling, and
minimal power absorption for serious riders and racers.
Why It Beats the Competition:
- - Flows substantially more coolant than OEM
- - Absorbs less power than MINO, Frank’s MX, and AS3 impellers
- - Optimized blade geometry for precise flow dynamics
- - Developed using advanced coolant flow bench and power absorption dyno testing
Designed using the same advanced impeller tech trusted in our CR500 and KX250F builds, the
KX125 “phi” Impeller is the smart upgrade to keep your engine running cooler — without sacrificing throttle response or horsepower.
Whether you’re racing or ripping singletrack, the
MSV Racing OptiFlo “phi” Impeller delivers the cooling efficiency and performance your KX125 deserves.
- In stock now — Order your KX125 impeller and ride at full potential.
