Wossner 8807DA Piston Kit - KTM 350 SX-F/XC-F Husqvarna FC/FX Gas Gas 350

Wossner 8807DA Premium Forged 4-Stroke Piston Kit - Standard Size A

Maintain the high-revving dominance of your 350cc powerhouse with the Wossner 8807DA Piston Kit. Specifically engineered for the KTM, Husqvarna, and Gas Gas 350 engine platforms, this Standard Size A forged kit is the professional choice for restoring Factory Quality performance. At Moto-House MX, we know the 350cc engine is designed to bridge the gap between agility and power, and Wossner’s aerospace-grade components ensure that balance remains perfect under the most grueling race conditions.

Forged from high-silicon aluminum alloy, this piston features advanced radial boss machining and enhanced oiling slots for superior wrist pin lubrication—critical for an engine that revs north of 13,000 RPM. The permanent skirt coating reduces friction and piston rock, leading to a quieter engine and faster break-in. With ring land treatment for improved oil control and a lightweight design that maintains extreme strength in the crown, the 8807DA is built to handle the high compression ratios found in modern Austrian 4-strokes.

Top Features: Wossner 8807DA Piston Kit

• Standard Size A (87.95mm Piston): Precision-engineered for the standard 88.00mm bore to maintain factory clearances and peak efficiency.
• Aerospace Forged Alloy: Superior structural integrity and thermal resistance to withstand the high temperatures of competitive motocross.
• Advanced Lubrication: Radial boss machining and annular grooves ensure consistent oil delivery to the wrist pin.
• Low-Friction Skirt Coating: Permanent coating minimizes wear and mechanical noise for smoother operation.
• Optimized Oil Control: Specialized ring land treatment improves ring seal and minimizes oil consumption.
• Complete Assembly: Kit includes the forged piston, high-performance rings, wrist pin, and pin locks.

Expert Pro-Tip: The 350cc engine is a precision instrument. Depending on your specific year and model, the compression ratio will vary between 13.5:1 and 14.2:1. During installation, always verify your cylinder's cross-hatch and ensure your timing chain and tensioner are in excellent condition to support the high-RPM demands of this forged piston.

Fitment & Compression Guide

Model Group	Year Range	Est. Compression
KTM 350 SX-F / XC-F	2020-2022	14.2:1
Husqvarna FC350 / FX350	2020-2022	14.2:1
Gas Gas MC 350F / EX 350F	2021-2023	14.2:1
KTM/Husqvarna 350 Models	2016-2019	14.0:1
KTM/Husqvarna 350 Models	2011-2015	13.5:1 / 13.7:1

Frequently Asked Questions

Q: Is this a Standard Size piston?
A: Yes, this is the 87.95mm Piston designed for the standard 88.00mm bore. If your cylinder has significant wear or damage, you may need a re-plate or an oversize piston.

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

Q: Why does the compression ratio change between years?
A: Wossner designs these pistons to match the factory geometry of each specific model generation. The variations in compression reflect the evolving combustion chamber designs from 2011 to 2023.

Recommended Pairings

• Complete Top End Gasket Set: Ensure a total seal for your high-compression rebuild.
• Motorex Cross Power 4T Oil: The ultimate lubrication for high-RPM Austrian 4-stroke 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.