Wiseco Pistons: Kawasaki KX250 76-2008, KX500 88-2004


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Wiseco MX Pistons
While Wiseco got its start in 2-stroke performance, the Wiseco team has remained at the forefront of powersports performance through
every era and evolution, including the development of high-performance 4-strokes. Today, Wiseco offers a range of forged 4-stroke
pistons covering everything from the casual rider looking for durability to the professional-level racer competing for wins.

Wiseco Pro-Lite
• The Forged 2-stroke piston that started it all
• Great value for reliable fun factor • Refreshed performance from the track to the trail •
Optomizing forging design for strength optimization • Extra lightening operations for enhanced
throttle response • Wrist pin, rings and circlips included

Wiseco GP Series
• Designed for Endurance/High RPM Applications
• Designed with optimized features for long service life and top-end power
• Electra-Coated crown, ring groove and pin bore resists potential wear, combustion heat damages,
and ring micro-welding • ArmorGlife skirt coating reduces friction to optimize performance potential
• Wrist pin, rings and circlips included

Wiseco Racer Elite
Designed for Full-Race Applications
• First 2-stroke piston to be forged with 2000-series alloy, providing greater tensile strength
• ArmorPlating surface treatment on crown, in ring groove and pin bores protext from harmful detonation,
friction wear, and ring micro-welding • ArmorFit skirt coating conforms to the cylinder bore for optimized
fitment, translating to optimized performance • Wrist pin, rings and circlips included

Wiseco Forged Series
Multi-Purpose Riding and Racing
• A complete range of forged pistons engineered for each specific 4-stroke powersports engine
• Convering hundreds of applications across ATV, Dirt Bike, Street, Snowmobile, UTV, V-Twin and more
in a variety of bore size and complression ratio options • Forged material optimizes strength and service
life • Performance enhancing features varied across applicable applications to maximize durability and
power • Wrist pin, rings and circlips included

Wiseco Racer Elite
Designed for Full-Race Applications
• Engineered to be a complete racing piston package to compete at the highest levels
• Industry-first features including asymmetrical skirt, lapped ring and ring groove operation to minimize
operating friction and maximize ring seal for overall improved power
• CNC-machines, billet construction for improved strength to weight ratio
• Rings, circlips, and DLC-coated wrist pin included

Additional information


KX250 79-1986, KX250 87-1989, KX250 90-1991, KX250 92-2001, KX250 93-2001, KX250 02-2004, KX250 05-2008, KX500 88-2004

Piston Type

Pro-Lite, ArmorGlide, Racer Elite, GP Series, Standard


67.40mm, 67.00mm, 67.50mm, 68.00mm, 68.50mm, 69.00mm, 69.50mm, 70.00mm, 70.50mm, 71.00mm, 71.50mm, 72.00mm, 86.00mm, 86.50mm, 87.00mm, 87.50mm, 88.00mm, 66.40mm


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Make Model Year
Kawasaki KX250 1979 - 1986
Kawasaki KX250 1987 - 1989
Kawasaki KX250 1990 - 1991
Kawasaki KX250 1992 - 2001
Kawasaki KX250 1993 - 2001
Kawasaki KX250 2002 - 2004
Kawasaki KX250 2005 - 2008
Kawasaki KX500 1988 - 2004
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