Wossner 8324DC Piston Kit - 2022-2026 Beta 300 RR Race Edition Xtrainer Standard Size C

Wossner 8324DC Standard Series Forged 2-Stroke Piston Kit - Standard Size C

Bring the compression and power of your Italian enduro machine back to factory-spec with the Wossner 8324DC Piston Kit. Specifically engineered for the Beta 300cc 2-stroke platform, including the 300 RR, Race Edition, X-Pro, and Xtrainer (2022-2026), the "Size C" piston is the professional solution for engines that have seen heavy use. At Moto-House MX, we know that after many hours on the trail, 300cc cylinders can expand; this +0.02mm Size C kit provides the precise fitment needed to eliminate piston rock and restore the legendary low-end torque Beta is known for.

Forged from high-performance aerospace aluminum alloy, the 8324DC offers superior structural integrity for the most demanding hard enduro conditions. This kit features a dual-ring configuration, which provides an exceptional secondary seal and better heat dissipation—vital for keeping your engine cool during technical climbs. To ensure maximum service life, Wossner applies a permanent molybdenum disulphide skirt coating that reduces friction and protects the cylinder wall. This 72.97mm piston is precision-matched for 73.02mm bores, allowing you to maximize the life of your Beta cylinder before requiring a costly replate.

Top Features: Wossner 8324DC Piston Kit

• Standard Size C (72.97mm): Specifically designed for 73.02mm bores, providing a tighter fit for cylinders with moderate wear to restore peak compression.
• Dual Ring Design: Optimizes cylinder sealing and heat transfer for consistent power delivery under high-load off-road conditions.
• Aerospace-Grade Forged Construction: Significantly stronger and more resilient than stock cast pistons, offering maximum fatigue resistance.
• Low-Friction Skirt Coating: Permanent skirt treatment reduces internal drag and ensures a smooth break-in and quieter operation.
• Lightweight Machining: Optimized for weight reduction without sacrificing strength in the crown or skirt wall, maintaining snappy throttle response.
• Complete Assembly: Kit includes the forged Size C piston, performance rings, wrist pin, and pin clips.

Expert Pro-Tip: When your Beta 300 cylinder has seen significant trail time and measures slightly larger than the original spec, moving to a Wossner Size C (72.97mm) is the expert way to restore perfect piston-to-wall clearance. Always use a precision bore gauge to confirm your cylinder measures 73.02mm before installation. For a professional-grade rebuild, always install with a fresh top-end gasket kit and utilize premium 2-stroke oil to protect your investment.

Fitment List

Year Range	Vehicle Brand	Vehicle Model
2022-2024	Beta	300 RR
2022-2025	Beta	300 RR - Race Edition
2025-2026	Beta	300 RR X-Pro
2022-2025	Beta	300 Xtrainer

Frequently Asked Questions

Q: When should I choose a Size C piston?
A: You should move to a Size C (72.97mm) when your cylinder has worn beyond the specifications for Size A or B. If your bore measures approximately 73.02mm, the Size C will bring your mechanical tolerances back to ideal levels.

Q: Does this forged kit fit the Beta Xtrainer?
A: Yes, this kit is fully compatible with the 300cc Xtrainer models from 2022 through 2025, as well as the RR and Race Edition models.

Q: What are the benefits of Wossner's skirt coating?
A: The permanent molybdenum disulphide coating reduces friction between the piston and cylinder wall, which helps during the critical break-in period and results in a quieter running engine.

Recommended Pairings

• Complete Top End Gasket Set: Essential for maintaining a proper seal and correct squish heights during your rebuild.
• Motul 800 2T Factory Line: Premium 2-stroke lubrication to ensure your new forged piston stays protected in the toughest enduro terrain.

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.