Description
MSV Racing OptiFlo "phi" High-Flow Water Pump Impeller – Kawasaki KX250 (1992–2007)
Adding “Water Pump” helps customers and Google immediately understand the product.
Revised description
More Coolant Flow Without Wasting Power
A hard-ridden or modified KX250 needs better cooling—but simply making an impeller larger or more aggressive can increase drag and consume horsepower.
The MSV Racing OptiFlo “φ” High-Flow Impeller was engineered to improve coolant circulation while minimizing the power required to drive the water pump. The result is a better balance of cooling performance and power efficiency for Kawasaki KX250 two-strokes.
Exact Fitment
- Kawasaki KX250 two-stroke
- Model years: 1992–2007
- Direct replacement for the original water-pump impeller
Why Upgrade?
- Increased Coolant Flow — Helps control engine temperature during racing, trail riding, slow technical sections, and high-load conditions.
- Reduced Power Loss — Designed to move more coolant without creating unnecessary water-pump drag.
- Optimized Blade Design — The OptiFlo “φ” profile balances coolant movement with power efficiency.
- Direct-Fit Installation — Engineered specifically for the 1992–2007 KX250 water-pump system.
Tested Against the Competition
The KX250 OptiFlo “φ” Impeller was evaluated using both a coolant-flow test bench and a power-absorption dyno.
Testing included comparisons with:
- OEM Kawasaki impeller
- MINO
- Frank’s MX
- AS3 Performance
The objective was not simply to create the highest-flowing impeller. It was to achieve the best combination of coolant flow and low power consumption.
Built for Riders Who Push Their KX250
Whether your KX250 is stock, modified, raced, or ridden hard in demanding terrain, the OptiFlo “φ” Impeller provides a carefully engineered cooling-system upgrade—not just a copy of the OEM design.
Made by riders. Tested with data. Built for performance.
Fitment