The Boyesen Super Cooler water pump kit is an aluminum investment cast water pump cover and impeller combo; specifically designed to enhance the performance of your engines cooling system. This high flow, hydrodynamic water pump kit has been tested and designed to flow more coolant. By increasing the flow, the engine will run cooler at a more constant temperature.
Investment cast aluminum construction
Increase coolant flow at all RPM ranges
Patented nautilus style impeller for hydrodynamic efficiency
Extends engine life
Made in the USA
Product Note:
Specification
Details
Color
Black
Country of Origin
USA
Finish
Powder Coated
Material
Aluminum
Vehicle Fitment
Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.
Yamaha
WR426F 2001-2002
WR450F 2003-2015
YFZ450 ATV 2004-2009, 2012-2013
YZ426F 2000-2002
YZ450F 2003-2009
Customer Reviews
Just buy it!
By Michael B. on
Just buy it! You won't be disappointed.
Great product.
I'm glad I bought it.
I will recommend this mfg to others
By Alfred A. on
Verified Purchaser
Great product, it performs as promised and was an extremely easy install.
Excellent pump
By Daniel D. on
Verified Purchaser
It was an easy install.
Bling with function.
By Fred G. on
Verified Purchaser
The Boyesen kit is top quality and well designed. The housing has an angle that helps keeping the coolant hose spaced from my aftermarket header. Perfect.
Supercooler
By Landon S. on
Verified Purchaser
The top bolt was a tight fit but it works well and keeps my bike cool on slow enduro parts.
Very nice
By Vincent M. on
Verified Purchaser
Very nice quality and looks awesome!
Supercooler
By Randy S. on
Verified Purchaser
It worked perfect.
Perfect
By Thomas S. on
Verified Purchaser
It works perfect as stated.
Better installation instructions
By Chris G. on
Verified Purchaser
Excellent - should of given new o-ring gasket but product is excellent.
Smart side by side upgrade
By Mark P. on
Verified Purchaser
Running cool and strong. Wise upgrade for any side by side.
Excellent quality and fit. 5 stars
Super Cooler
By Leo C. on
Verified Purchaser
Replaced stock water pump with the Boysen Super Cooler. Works well and no more over heating issues.
Boyesen Supercooler Kit
By Calvin M. on
Verified Purchaser
Works good. Keeps running lots better on my 1000 Outlander
Great product
By lou on
Good grief I love this thing. No more emptying the coolant to change the oil. My bike has actually quit overheating which seems to be an issue on the RMZ250.
How many stars would you give this product? Write a review.
Questions & Answers
Does it come with the water pump seals?
By Mason
Hey my water pump seals are bad on my 2017 ktm 350 sxf and I was going to upgrade this to my bike. I was wondering if I was gonna have to buy new seals. Thank you.
No seals are included with these Boyesen Supercooler Water Pump Kits. You can re-use the OEM water pump seal, assuming it's in good condition. Otherwise, check out the Vertex-Winderosa Mechanical Water Pump Seal on our website to order the appropriate kit to fit your machine so you have everything you need on hand to refresh the water pump assembly.
Will it fit a 2020 yz450f?
By Anon.
If not, can you tell me why I am not sure what the difference is between the f. And the f. X.
Yes! If you were t select the 2020 Yamaha YZ450F Boyesen Supercooler kit from our fit guide, you'd receive the correct components to fit your machine.
Does this include the water pump gasket
By Brian
Yes, the kit would include a gasket.
Does it need a gasket?
By Rob
A gasket will be included with the kit.
Will this fit a 2020 yz125x?
By Matthew
Is this part WPK 31AB
If you choose a 2020 YZ125, it would also fit that 2020 YZ125X model.
Is The water pump aluminum or is it just a cover?
By Bryce
This would be for the upgraded aluminum impeller and cover to house it.
Have a question? Please ask our experts and customers who own this product.
Verified Purchaser