Wiseco GP Series Piston Kit with Gaskets - Yamaha YZ250 / YZ250X (2002-2025) - 66.40mm Bore - 2-Stroke
- Ships next business day
- 30-day hassle-free returns
- Call us: 541-668-7503
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The Wiseco GP Series represents the pinnacle of 2-stroke piston technology for the legendary Yamaha YZ250. Engineered for endurance racing and sustained high-RPM operation, this race-spec piston features advanced coatings and a single ring design for maximum performance.
✓ Fits:
- 2002-2025 Yamaha YZ250
- 2015-2025 Yamaha YZ250X
✓ 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
- 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
✓ What's Included:
- Wiseco GP Series Piston - Premium 4032 aluminum alloy with Electra + ArmorGlide® coating
- Ring (1x) - Single ring design for reduced friction
- Wrist Pin
- Circlips
- Wrist Pin Bearing
- Top End Gasket Set
Note: Wiseco ring types are not interchangeable
Note: Wiseco pistons can be fitted only with Wiseco rings
Note: Cylinder sleeves must be purchased separately if needed
Note: Bore Size: 66.40 mm (Standard)
Ships fast from DuneGoonShop!
📦 Shipping Information
In-stock items ship next business day. ModQuad parts dispatch Monday through Thursday.
Made-to-order and custom powder coat items show their lead time at the top of this page, right next to the truck icon. These are built fresh for you, so timing varies by brand and current backlog.
Need something by a specific date? Call us at 541-668-7503 before ordering and we will check stock and ETA on that exact part. We can often point you to an in-stock alternative from another distributor.
Questions? Contact us, we respond within 24 hours.
