Wiseco High Performance Piston Kit PK1573 — Yamaha YZ250 1999-2001

Product Description

The Wiseco PK1573 Piston Kit is the industry standard for riders looking to restore their Yamaha YZ250 to factory-fresh power. Engineered for durability and high-RPM reliability, this comprehensive top-end rebuild kit provides everything you need to refresh your engine, ensuring seamless compatibility and precision performance on the track or the trail.

Crafted from premium 4032 aluminum alloy, these Pro-Lite pistons are designed to minimize expansion and maintain tight clearances under intense thermal conditions. By including a matching top-end gasket kit, Wiseco ensures that your rebuild is sealed perfectly, preventing compression loss and maintaining the crisp throttle response that every 2-stroke rider demands.

Top Features: Wiseco High Performance Piston Kit

• Complete top-end kit including piston, rings, wrist pin, circlips, and head/base gaskets
• Manufactured from high-strength 4032 aluminum alloy for superior longevity
• Precision-engineered 66.40 mm bore size to match OEM specifications
• Designed for off-road durability and optimized 2-stroke power delivery

Please review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.

Fitment List

Frequently Asked Questions

Q: Can I use different aftermarket rings with my Wiseco piston?
A: No. Wiseco pistons are designed specifically for use with Wiseco rings; they are not interchangeable with other brands or different ring series types.

Q: Does this kit include a new cylinder sleeve?
A: No, the cylinder sleeve is not included. If your current cylinder is damaged or out of spec, you will need to purchase a replacement sleeve separately.

Expert Pro-Tip: Always check your ring end gap before final assembly. Even with a high-quality kit like this, verifying that the gap is within the manufacturer's specified tolerance is the best insurance policy against premature seizure or loss of compression. Also, never force the circlips—ensure they are fully seated in the groove to prevent catastrophic engine failure.

Recommended Pairings:
o Yamaha YZ250 Performance Parts & Upgrades
o Yamaha 2-Stroke Performance Parts
o Premium Motorcycle Chemicals

At Moto-House MX, we carry the best brands in motocross and off-road performance. Our team has over 40 years of experience helping riders get more out of their bikes. Every order ships fast from our Central Florida location.

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