Wossner 8019DB Piston Kit - 1989-2006 Honda NSR125R CRM125R 2-Stroke Size B

Wossner 8019DB Premium Forged 2-Stroke Piston Kit - Size B

When your Honda 125cc engine requires a top-end refresh, the Wossner 8019DB Size B Piston Kit delivers the Factory Quality precision needed to restore crisp 2-stroke performance. Specifically engineered for cylinders with a 54.01mm bore, this forged piston ensures a perfect fit for engines that have seen regular use, providing superior compression and a quieter run. At Moto-House MX, we provide the high-performance components required to keep your classic Honda NSR or CRM performing at its peak.

Forged from aerospace-grade aluminum alloy, this piston offers significantly higher strength and thermal efficiency than standard cast pistons. The permanent skirt coating reduces internal friction and piston rock, extending the life of your cylinder and improving break-in reliability. Whether you are navigating technical trails on a CRM125R or street riding on an NSR125R, the dual-ring design of the 8019DB provides consistent power and excellent oil control for your 124cc powerplant.

Top Features: Wossner 8019DB Piston Kit

• Standard Size B (53.95mm Piston): Engineered for 54.01mm bores to maintain ideal mechanical clearances.
• Aerospace Forged Alloy: Superior structural integrity designed to withstand the high-RPM stresses of 2-stroke racing.
• Permanent Skirt Coating: Minimizes friction and engine noise for smoother operation and longevity.
• Dual-Ring Design: Optimized for a reliable combustion seal and consistent power delivery.
• Complete Kit: Includes everything needed for the rebuild: forged piston, rings, 16mm wrist pin, and clips.

Expert Pro-Tip: Always measure your cylinder with a precision bore gauge before ordering. If your cylinder has slight wear from normal operation, the Size B piston is the professional choice to restore factory-spec clearances and eliminate piston slap.

Fitment List

Year Range	Vehicle Brand	Vehicle Model & Size
1989-2003	Honda	NSR125R
1991-2006	Honda	CRM125R

Frequently Asked Questions

Q: When should I use a Size B piston instead of Size A?
A: Size B is 0.01mm larger than Size A. It is used when a cylinder is no longer brand new and has developed very slight wear, allowing you to maintain the correct piston-to-wall clearance.

Q: Does this kit include the small-end (wrist pin) bearing?
A: No, the kit includes the piston, rings, pin, and clips. We highly recommend purchasing a new 16mm wrist pin bearing separately when performing a top-end rebuild.

Q: Is this a big bore kit?
A: No, this is a standard-diameter replacement piston for the stock 125cc (124cc displacement) cylinder.

Recommended Pairings

• Top End Gasket Kit: Essential for ensuring a leak-free seal during your Honda engine rebuild.
• Motorex Cross Power 2T: Premium synthetic 2-stroke oil for maximum protection of your forged piston.

Restore your Honda’s 2-stroke snap 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.