Wiseco® 631M07250 - Pro-Lite Series Single Piston Kit

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Vehicle Fitment

KTM300 EXC 1991-1994
300 MXC 1991-1994

Product Details

Pro-Lite Series Single Piston Kit (631M07250) by Wiseco®. The lightweight and durable piston solution for your engine needs. Machined from optimized forgings, manufactured from aerospace quality materials, using precision CNC machining techniques. Each Pro-Lite piston comes complete with high performance alloy rings and precision high quality piston pin. Each Pro-Lite piston is ultimately lightened for instant throttle response that you can feel!


  • Cylinder replating required.


Bore - Actual: 72.50 mm
Bore - Oversize: 0.50 mm
Bore - Standard: 72.00 mm
Displacement: 299cc
Stroke: 73.00 mm


  • 2854CD - 72.50 mm Ring Set
  • CW18 - 18 mm Round Wire Locks - Set of Two
  • Ring - Set
  • S477 - Piston Pin 18 mm x 2.075 Non Chromed TW


  • Expertly crafted utilizing advanced technologies
  • Designed to provide exceptional quality and durability
  • Made from high-quality materials for excellent durability and safety

Wiseco® began the manufacture of pistons 70 years ago when founder Clyde Wiseman started making them in his garage. The pistons he made at that time were destined for use in big bore marine engines, and like so many successful companies that began in people’s garages, word of what he was doing spread and soon he was making pistons for friends and so business began to grow. When Wiseco was officially formed in 1941 it serviced the needs of racers and powersports enthusiasts, and today the powersports sector – predominantly motorcycles and ATVs – now accounts for the largest portion of the work done by the business.

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Wiseco® 631M07250 - Pro-Lite Series Single Piston Kit

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