Wossner 8154DA Piston Kit - Honda CR250R (1978-1980) ATC250R (1981-1984)

Wossner 8154DA Premium Forged 2-Stroke Piston Kit - Standard Size A

Revitalize your vintage Honda 2-stroke with the precision and durability of the Wossner 8154DA Piston Kit. Specifically engineered for the 1978-1980 Honda CR250R and the 1981-1984 Honda ATC250R, this Standard Size A kit is the ultimate choice for restoring Factory Quality power to these legendary machines. At Moto-House MX, we specialize in providing high-performance forged components that keep classic off-road and ATV engines performing like new.

Forged from aerospace-grade aluminum alloy, this piston offers a significant upgrade in structural integrity and heat resistance compared to original cast pistons. The permanent skirt coating is a standout feature, reducing internal friction and piston rock for a quieter engine and smoother power delivery across the RPM range. With optimized machining that balances lightweight performance with reinforced strength in the crown and skirt walls, the 8154DA ensures your vintage Honda remains reliable on the track or trail.

Top Features: Wossner 8154DA Piston Kit

• Standard Size A (69.94mm Piston): Precision-engineered for the standard 70.00mm bore to restore peak compression and performance.
• Aerospace Forged Alloy: Premium aluminum construction provides superior durability for high-performance vintage racing.
• Permanent Skirt Coating: Minimizes friction and engine noise for smoother operation and an efficient break-in period.
• Dual-Ring Design: Optimized for a reliable combustion seal and consistent power delivery in 250cc air-cooled and early liquid-cooled engines.
• Complete Assembly: Kit includes the forged piston, high-performance rings, wrist pin, and clips.

Expert Pro-Tip: When rebuilding these classic Honda engines, always ensure your cylinder bore is within factory service limits and free of heavy glazing. For the ATC250R and early CR250R, checking your air intake boot for cracks and ensuring a fresh top-end gasket kit is used will prevent lean conditions that can damage a new forged piston.

Fitment List

Year Range	Vehicle Brand	Vehicle Model & Notes
1978-1980	Honda	CR250R (Off-Road)
1981-1984	Honda	ATC250R (ATV)

Frequently Asked Questions

Q: Is this a Standard Size piston?
A: Yes, this is the 69.94mm piston designed for the standard 70.00mm bore. If your cylinder has been bored over to clean up damage, you will need an oversize kit.

Q: Does this kit include the wrist pin bearing?
A: No, the kit includes the piston, rings, pin, and clips. We highly recommend purchasing a new small-end bearing separately whenever you perform a top-end refresh on a vintage engine.

Q: Will this fit the liquid-cooled 1985-1986 ATC250R?
A: No, this kit is specifically designed for the earlier 1981-1984 ATC250R and the 1978-1980 CR250R engine platforms.

Recommended Pairings

• Top End Gasket Kit: Essential for a professional, leak-free engine rebuild.
• Motorex Cross Power 2T Oil: Premium synthetic protection specifically formulated for high-performance 2-strokes.

Restore your vintage Honda’s power and precision today. Buy now at Moto-House MX!

Moto-House MX – Choice of Champions – is located in Clermont/Montverde, FL. The Best Motocross/UTV & ATV Shop in Central Florida. Stop by our local store in Montverde, FL or enjoy lightning-fast shipping across the USA.