Wossner 8156D050 Piston Kit - 1984-1986 Honda CR250R ATC250R TRX250R 66.50mm

Wossner 8156D050 Premium Forged Piston Kit

If your vintage 2-stroke engine is losing compression or it is time for a top-end refresh, the Wossner 8156D050 Piston Kit is the definitive solution for restoring lost power and crisp throttle response. Designed specifically for the legendary Honda 250cc powerplants, this kit ensures your machine maintains peak performance. When you demand reliability on the track or the dunes, Moto-House MX provides the precision-engineered parts needed to keep you in the lead.

Forged from aerospace-grade aluminum alloy, these pistons provide Factory Quality durability and significant lightness compared to cast alternatives. Each piston features a permanent skirt coating that reduces friction and piston rock, resulting in a quieter engine and improved mechanical efficiency. This +0.50mm oversize piston is precision-machined to balance weight savings with the structural strength required for high-revving 2-stroke performance.

Top Features: Wossner 8156D050 Piston Kit

• Aerospace Forged Alloy: Engineered from high-tensile aluminum for maximum durability in 2-stroke environments.
• Low-Friction Skirt Coating: Specialized permanent coating minimizes wear and engine noise.
• Dual Ring Design: Provides a superior seal and heat transfer for consistent power delivery.
• Precision Oversize: 66.50mm bore size (+0.50mm) to refresh worn cylinders and restore displacement.
• Complete Kit: Includes the forged piston, high-performance rings, wrist pin, and circlips.

Expert Pro-Tip: When installing a 2-stroke piston, ensure the ring end gaps are properly aligned with the locating pins in the ring grooves to prevent catastrophic port snagging.

Fitment List

Year Range	Vehicle Brand	Vehicle Model & Size
1984-1985	Honda	CR250R
1985-1986	Honda	ATC250R (ATC)
1986	Honda	TRX250R (ATV)

Frequently Asked Questions

Q: Is this an oversize piston?
A: Yes, this is a +0.50mm oversize piston (66.44mm piston size) for cylinders with a 66.50mm bore.

Q: Does this kit work for both the ATC and the TRX models?
A: Yes, this piston kit is compatible with the 250cc 2-stroke engines found in the Honda CR250R, ATC250R, and TRX250R within the specified year ranges.

Q: What are the benefits of the skirt coating?
A: The permanent coating reduces friction during the break-in period and throughout the piston's life, preventing scuffing and reducing engine noise.

Recommended Pairings

• Cometic Top End Gasket Kit: Complete your rebuild with a high-quality gasket set for a perfect seal.
• Maxima Castor 927 Premix: Keep your new 2-stroke piston lubricated with the best racing premix oil.

Don't wait for a failure—restore your Honda's legendary power 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.