Description
🔥 Boyesen Supercooler Water Pump Cover and Impeller Kit – WPK-38B – 2003-2009 Yamaha YZ450F, YFZ450
The Boyesen Supercooler Water Pump Cover and Impeller Kit WPK-38B is your secret weapon against overheating. Designed to keep temps steady and your engine happy, this bolt-on kit gives your Yamaha a high-flow cooling upgrade that’s race-tested and trail-approved.
This isn’t your average water pump. The Boyesen Supercooler water pump kit for Yamaha YZ450F, WR450F, and YFZ450 features an investment-cast aluminum cover paired with Boyesen’s patented nautilus-style impeller—engineered for hydrodynamic flow at all RPMs. It pumps more coolant, more efficiently, which means cooler temps and longer engine life.
From deep sand motos to slow-crawling trail rides, this Boyesen Supercooler water pump kit for Yamaha WR450F, YZ426F, and YFZ450 helps prevent heat fade and keeps your ride running strong.
✅ Fitment:
- 2000–2002 Yamaha YZ426
- 2001–2002 Yamaha WR426F
- 2003–2009 Yamaha YZ450F
- 2003–2015 Yamaha WR450F
- 2004–2009, 2012–2013 Yamaha YFZ450
❓FAQs:
Q: Will this fit my stock radiator setup?
A: Yep—direct bolt-on with no mods needed. Works with OEM hoses and radiator.
Q: Is it really noticeable?
A: 100%! Riders report cooler temps, consistent power, and better endurance in tough conditions.
Q: Does it include everything I need?
A: You get the cover and impeller—just reuse your bolts and gasket or grab a fresh one.
💧 Cool it down and go full throttle—click “Buy Now” and keep your Yamaha running like a champ!
Yamaha YZ450F Performance Parts and Accessories
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