Wiseco GP Series Piston Kit with Gaskets - Honda CR250R (2005-2007) - 66.40mm Bore - Single Ring - 2-Stroke Race-Spec

Wiseco GP Series Piston Kit with Gaskets - Honda CR250R (2005-2007)

The Wiseco GP Series represents the pinnacle of 2-stroke piston technology for the legendary Honda CR250R. Engineered for endurance racing and sustained high-RPM operation, this race-spec piston features advanced coatings, extra lightening operations, and a single ring design for maximum performance - the same technology used by professional racers!

🏁 GP Series Race-Spec Features

• Electra Coating - Crown, ring groove(s), and pin bores coated for maximum wear resistance
• ArmorGlide® Skirt Coating - Protection from micro-welding, galling, and detonation
• Single Ring Design - Reduced friction and weight for maximum performance
• Extra Lightening Operations - Enhanced throttle response
• Made in USA - Engineered, forged, and machined in the USA

Kit Includes

• Wiseco GP Series Piston - Premium 4032 aluminum alloy with Electra + ArmorGlide®
• 1x Ring - Single ring design
• Wrist Pin
• Circlips
• Wrist Pin Bearing
• Top End Gasket Set

Key Features

• GP Series design for professional-level racing performance
• 4032 aluminum alloy construction - optimized for 2-stroke applications
• Dual coating system - Electra + ArmorGlide® for ultimate protection
• Single ring design for reduced friction and weight
• Designed for endurance and sustained RPM riding
• Complete top-end gasket kit included
• Wrist pin bearing included - everything for a complete rebuild
• Standard bore - direct OEM replacement

Important Notes

• Wiseco ring types are not interchangeable
• Wiseco pistons can be fitted only with Wiseco rings
• Cylinder sleeves must be purchased separately if needed

Piston Specifications

• Bore Size: 66.40 mm (Standard)
• Piston Diameter: 66.35 mm
• Stroke Length: 72.00 mm
• Material: 4032 Aluminum Alloy
• Skirt Coating: ArmorGlide® + Electra
• Ring Design: Single Ring
• Style: GP Series

Engine Specifications

• Displacement: 249cc
• Engine Type: 2-Stroke
• Weight: 1.44 lbs

Fitment

• Honda CR250R: 2005-2007

The Final CR250R Years

2005-2007 were the final production years for the legendary Honda CR250R - Honda discontinued 2-stroke production after 2007. This GP Series piston keeps these iconic machines competitive!

Why Wiseco GP Series?

The GP Series is Wiseco's ultimate 2-stroke racing piston. The Honda CR250R is one of the most legendary motocross bikes ever made - and this piston delivers the reliability racers need to win!