Wossner 8170DA Piston Kit - 2005-2007 Honda CR125R 2-Stroke

Wossner 8170DA Premium Forged 2-Stroke Piston Kit - Standard Size A

Maximize the high-RPM potential of your Honda 125 with the precision and durability of the Wossner 8170DA Piston Kit. Specifically engineered for the final generation of the legendary 2005-2007 Honda CR125R, this Standard Size A kit is the ultimate choice for restoring Factory Quality power to your small-bore engine. At Moto-House MX, we specialize in providing high-performance forged components that keep these iconic motocross machines at the front of the pack.

Forged from aerospace-grade aluminum alloy, this piston offers a significant upgrade in structural integrity and thermal stability compared to standard cast pistons. This is critical for 125cc engines that live at the top of the powerband. The permanent skirt coating is a standout feature, reducing internal friction and piston rock for a quieter engine and smoother power delivery. Optimized machining balances lightweight performance with reinforced strength in the crown and skirt walls, ensuring your CR125R remains reliable under intense racing conditions.

Top Features: Wossner 8170DA Piston Kit

• Standard Size A (53.95mm Piston): Precision-engineered for the standard 54.00mm bore to restore peak compression and performance.
• Aerospace Forged Alloy: Premium aluminum construction provides superior durability for high-revving 125cc motocross engines.
• Low-Friction Skirt Coating: Permanent coating minimizes wear and mechanical noise for smoother operation and efficient break-in.
• Single-Ring Racing Design: Optimized for reduced drag and maximum high-RPM efficiency in the 125cc class.
• Complete Assembly: Kit includes the forged piston, high-performance ring, wrist pin, and clips.

Expert Pro-Tip: The 2005-2007 CR125R utilizes an electronic power valve and a highly refined port design. When installing this Wossner forged piston, ensure your cylinder is clean and the Nikasil plating is within service limits. Using a new top-end gasket kit and a fresh small-end bearing is essential for maintaining the high-RPM reliability these engines are known for.

Fitment List

Year Range	Vehicle Brand	Vehicle Model & Size
2005-2007	Honda	CR125R

Frequently Asked Questions

Q: Is this a Standard Size piston?
A: Yes, this is the 53.95mm piston designed for the standard 54.00mm bore. If your cylinder has been bored over or replated to a larger size, you will need an oversize kit.

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

Q: Will this fit 2004 or older CR125R models?
A: No, this specific kit is engineered for the 2005-2007 engine platform. Earlier CR125R models utilize different piston heights and ring configurations.

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 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.