Wiseco 66.40 mm Pro-Lite 804M06640 Piston Kit
Wiseco 66.40 mm Pro-Lite 804M06640 Piston Kit
Wiseco 66.40 mm Pro-Lite 804M06640 Piston Kit
Wiseco 66.40 mm Pro-Lite 804M06640 Piston Kit
Wiseco 66.40 mm Pro-Lite 804M06640 Piston Kit
Wiseco 66.40 mm Pro-Lite 804M06640 Piston Kit
Wiseco 66.40 mm Pro-Lite 804M06640 Piston Kit
Wiseco 66.40 mm Pro-Lite 804M06640 Piston Kit
Wiseco 66.40 mm Pro-Lite 804M06640 Piston Kit
Wiseco 66.40 mm Pro-Lite 804M06640 Piston Kit
Wiseco 66.40 mm Pro-Lite 804M06640 Piston Kit
Wiseco 66.40 mm Pro-Lite 804M06640 Piston Kit
Wiseco 66.40 mm Pro-Lite 804M06640 Piston Kit
Wiseco 66.40 mm Pro-Lite 804M06640 Piston Kit
Wiseco 66.40 mm Pro-Lite 804M06640 Piston Kit
Wiseco 66.40 mm Pro-Lite 804M06640 Piston Kit
Wiseco 66.40 mm Pro-Lite 804M06640 Piston Kit
Wiseco 66.40 mm Pro-Lite 804M06640 Piston Kit
Wiseco 66.40 mm Pro-Lite 804M06640 Piston Kit
Wiseco 66.40 mm Pro-Lite 804M06640 Piston Kit

Wiseco 66.40 mm Pro-Lite 804M06640 Piston Kit

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  • $171.95
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The Pro-Lite series is Wiseco's staple forged 2-stroke piston, offering great value for reliable all-purpose riding. These pistons are designed for both track and trail, providing refreshed performance with every ride. Pro-Lite pistons feature optimized forging for strength and extra lightning operations for enhanced throttle response. This all-purpose piston is perfect for riders seeking a balance of performance and reliability. 66.40 mm Bore
  • Dedicated forging design for strength-to-weight optimization
  • Extra lightening operations for enhanced throttle response
  • Engineered, forged, and machined in the USA in Mentor, OH
  • High-quality ring(s), wrist pin(s), and circlips included
  • Refreshed performance from the track to the trail
  • Designed for all-purpose 2-stroke riding
  • Great value for reliable fun factor

The Wiseco Pro-Lite piston kit is a forged 2-stroke piston designed for reliable all-purpose riding. With a 66.40 mm bore, it is suitable for track and trail use and is engineered to provide refreshed performance with every ride.

The piston features a dedicated forging design optimized for strength-to-weight balance, along with additional lightening operations intended to enhance throttle response. Wiseco engineers, forges, and machines the piston in the USA in Mentor, Ohio. The kit includes high-quality rings, a wrist pin, and circlips.

This piston kit fits 1999–2008 Yamaha YZ250 models. The manufacturer part number is 804M06640, and the vendor part number is 804M06640. Verify the model year and engine application before installation. This product is not California Air Resources Board approved.

Features:

  • Bore: 66.40 mm
  • Dedicated forging design optimized for strength-to-weight performance
  • Additional lightening operations for enhanced throttle response
  • Engineered, forged, and machined in the USA in Mentor, Ohio
  • Includes high-quality rings, wrist pin, and circlips
  • Fits 1999–2008 Yamaha YZ250 models
  • Manufacturer part number: 804M06640
  • Vendor part number: 804M06640



Air Freight Prohibited: false
Not Carb Approved: true
Carb Acknowledgement Required: true
Ltl Freight Required: false
Prop 65: Y
Part Type: powersports
Epa: N/A
Regular Stock: t
Units Per Sku: 1
Fitment:
1999 Yamaha YZ250 Base
2000 Yamaha YZ250 Base
2001 Yamaha YZ250 Base
2002 Yamaha YZ250 Base
2003 Yamaha YZ250 Base
2004 Yamaha YZ250 Base
2005 Yamaha YZ250 Base
2006 Yamaha YZ250 Base
2007 Yamaha YZ250 Base
2008 Yamaha YZ250 Base
2009 Yamaha YZ250 Base
2010 Yamaha YZ250 Base
2011 Yamaha YZ250 Base
2012 Yamaha YZ250 Base
2013 Yamaha YZ250 Base
2014 Yamaha YZ250 Base
2015 Yamaha YZ250 Base
2016 Yamaha YZ250 Base
2016 Yamaha YZ250X Base
2017 Yamaha YZ250 Base
2017 Yamaha YZ250X Base
2018 Yamaha YZ250 Base
2018 Yamaha YZ250X Base
2019 Yamaha YZ250 Base
2019 Yamaha YZ250X Base
2020 Yamaha YZ250 Base
2020 Yamaha YZ250X Base
2021 Yamaha YZ250 Base
2021 Yamaha YZ250X Base
2022 Yamaha YZ250 Base
2022 Yamaha YZ250X Base
2023 Yamaha YZ250 Base
2023 Yamaha YZ250X Base
2024 Yamaha YZ250 Base
2024 Yamaha YZ250X Base