Wossner original mounting Piston kitRef : WO00379A / 1124798002

WÖSSNER Forged Piston - Manufacturer Ref. 4091DB

Forged aluminum piston specially designed for motocross competition, intended for engine rebuilding or preparation of a 350 cm3. Compact and robust, it features factory dimensions with an oversize to ensure smooth sliding in the cylinder after reboring.

• Diameter: Ø 87.960 mm (87.96 mm)
• Oversizing: +0.1 mm (letter B)
• Wössner Compression Ratio: 14.6:1
• Material: Forged aluminum
• Number of Rings: Kit (rings included)
• Recommended Ring Reference: TPR88.00
• Manufacturer Reference: 4091DB

Ideal for motocross/enduro riders looking for a quality wear part: the forging provides better mechanical strength and resistance to thermal and mechanical stresses encountered at high RPM. This piston maintains a standard compression according to Wössner specifications while offering the dimensional precision necessary after reboring.

Main compatibilities: KTM 350 SX-F (2025), HUSQVARNA FX 350 (2024), GAS GAS MC 350 F (2024). Before installation, check the cylinder bore, piston-cylinder clearance, and adhere to installation recommendations (rings, timing, lubrication).