Wossner 8958DA Piston Kit - 2019-2023 Kawasaki KX450 KX450X KX450SR Size A

Wossner 8958DA Premium Series Forged 4-Stroke Piston Kit - Standard Size A

Refresh the power of your "Team Green" machine with the Wossner 8958DA Piston Kit. Engineered specifically for the 2019-2023 Kawasaki KX450, KX450X, and the high-performance KX450SR, this Premium Series forged kit is the professional choice for maintaining "Factory Quality" reliability. At Moto-House MX, we know that the modern KX450 engine demands precision; Wossner’s aerospace-grade forged components provide the structural integrity needed to handle the high-revving nature of championship-winning 4-stroke engines.

Forged from aerospace-grade aluminum alloy, the 8958DA maintains a high-performance 12.6:1 compression ratio, ensuring crisp throttle response and the broad powerband Kawasaki riders depend on. This kit features advanced radial boss machining and enhanced oiling slots for superior wrist pin lubrication—a critical upgrade for the intense thermal loads of motocross and cross-country racing. The permanent skirt coating reduces internal friction and piston rock, resulting in a quieter engine and a more controlled break-in period. This Standard Size A piston (95.96mm) is precision-matched for 96.00mm bores, restoring your Kawasaki to its original race-winning tolerances.

Top Features: Wossner 8958DA Piston Kit

• Standard Size A (95.96mm): Precision-engineered for 96.00mm bores to maintain tight factory clearances and maximum mechanical efficiency.
• 12.6:1 Compression Ratio: Delivers reliable, race-ready power that is compatible with high-quality pump fuel and racing blends.
• Premium Series Forging: Significantly stronger and more heat-resistant than OEM cast pistons, ideal for the high-impact stress of off-road racing.
• Advanced Lubrication Design: Radial boss machining and specialized oiling slots ensure the wrist pin stays lubricated during sustained high-load operation.
• Low-Friction Skirt Coating: Permanent coating reduces drag and protects your cylinder walls from premature wear.
• Complete Assembly: Kit includes the forged piston, high-performance rings, wrist pin, and pin locks.

Expert Pro-Tip: The 2019-2023 KX450 platform is a masterpiece of engineering, but maintaining the top end is vital for peak performance. Size A is the ideal choice for a cylinder that is still within factory service limits or has been freshly replated. When installing the 8958DA, always check your ring end gap and inspect your timing chain and guides. Pairing this build with a fresh top-end gasket kit and premium synthetic oil will ensure your Kawasaki stays at the front of the pack.

Fitment List

Year Range	Vehicle Brand	Vehicle Model
2019-2023	Kawasaki	KX450
2021-2023	Kawasaki	KX450X (Cross Country)
2022-2023	Kawasaki	KX450SR (Special Racer)

Frequently Asked Questions

Q: Is this a Standard Size piston?
A: Yes, this is the 95.96mm piston designed for the standard 96.00mm bore found on the 2019-2023 KX450 models. It is the correct choice for cylinders within factory service limits.

Q: Does this kit include the gasket set?
A: No, the kit includes the forged piston, rings, wrist pin, and locks. A complete top-end gasket set is sold separately and is required for a professional engine rebuild.

Q: Why choose Wossner for my Kawasaki KX450?
A: Wossner forged pistons are denser and stronger than original cast parts. They handle high heat and mechanical stress more effectively, providing a superior safety margin during aggressive racing and trail riding.

Recommended Pairings

• Complete Top End Gasket Set: Ensure a professional, leak-free seal and proper engine compression.
• Motorex Cross Power 4T Oil: Premium synthetic lubrication specifically designed for high-performance 4-stroke race engines.

Restore your machine’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.