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Boyesen Spectra Supercooler Kit Yamaha YZ450F / WR450F / YZ426F / WR426F 2000-2013

Item: P363722
Rebate Available! View Details
This product is vehicle specific.
Select a bike to ensure fitment.
Looking for a different bike?
Please select a Finish to view availability.

Product Details

Boyesen Spectra Supercooler Kit Yamaha YZ450F / WR450F / YZ426F / WR426F

Boyesen SuperCooler water pump kits include an aluminum investment cast cover and impeller combo which is specifically designed to enhance the performance and durability of your cooling system. This high-flow, hydrodynamic water pump has been tested at the highest levels of competition, and has been shown to flow up to 26% more coolant than most stock pumps. By increasing coolant flow, the engine will run cooler at a more constant temperature which translates to more horsepower and maximum engine protection.


  • Increased coolant flow at all RPM ranges
  • Keeps engine in optimum temperature range and prevents overheating
  • Reduces cavitation and hydraulic friction 
  • Seamless hydrodynamic design
  • High-capacity inlets
  • Patented nautilus style cast aluminum impeller 
  • Offered in multiple powder coated colors to match any machine
  • Does not include a new gasket

Note: Images are for reference only, actual pump will vary based on make and model.

Product Style RevZilla Item # MFR. Product # Availability
Product Style Black RevZilla Item #1190399 MFR. Product #WPK-38B/WPK38B AvailabilityIn Stock: Ships within 24 hours
Product Style Magnesium RevZilla Item #1190398 MFR. Product #WPK-38M/WPK38M AvailabilityIn Stock: Ships within 24 hours
This product is vehicle specific.
Select a bike to ensure fitment.
This Product Fits
WR426F 2001, 2002
WR450F 2003-2013
YZ426F 2000, 2001, 2002
YZ450F 2003-2009
This item is also available for 45 different bikes. View All Models
CRF150R 2007-2017
CRF150R Expert 2007-2017
CRF250R 2010-2017
CRF250R 2004-2009
CRF250X 2004-2017
CRF450R 2002-2008
CRF450R 2009-2016
FC250 2014-2015
FC350 2014-2015
FC450 2014-2015
FE250 2014-2015
FE350 2014-2015
FE450 2014-2015
FE501 2014-2015
250 SX-F 2013-2015
250 SX-F Factory Edition 2015
250 XC-F 2013-2015
350 EXC-F 2012-2015
350 SX-F 2011-2012
350 SX-F 2013-2016
350 XC-F 2011-2015
450 SX-F 2013-2016
450 SX-F Factory Edition 2013-2016
450 XC-F 2013-2016
450 XC-W 2013-2016
500 XC-W 2012-2016
KLX450R 2008-2009
KX100 2001-2016
KX250F 2004-2016
KX450F 2006-2015
KX85 2001-2016
RM85 2002-2016
RM85L 2002-2015
RMZ250 2004-2006
RMZ250 2007-2012
RMZ450 2005-2007
RMZ450 2008-2016
WR250F 2015-2016
WR250F 2001-2013
YZ250 1999-2017
YZ250F 2014-2016
YZ250F 2001-2013
YZ250FX 2015-2016
YZ450F 2010-2013
YZ450F 2014-2016
Product Description
Part Numbers
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