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Motorbike parts and tools

Engine parts & cables

Upper engine

Piston kit Wossner forged - 4086

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Wossner forged - 4086 Piston kitRef : WO00371A / 1122777003

255,21 ^€

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Description
Compatible motorbikes
Questions and answers

DescriptionWossner forged - 4086 Piston kit

Product details :

Features

The forged piston WÖSSNER 4085 (manufacturer ref. 4085DC) is designed for motocross riders seeking a robust and precise engine component. Designed and manufactured in Germany by the specialist Wössner, it adheres to manufacturing standards for 2-stroke and 4-stroke engines and fits typical 450cc off-road displacements.

Type: forged piston
Material: aluminum
Diameter: Ø 96.98 mm (oversize letter C)
Compression: high compression
Number of rings: 3
Finish: anti-friction treatment of the skirt
Delivered with: rings, circlips, and pin

The treated skirt reduces friction during temperature rise, while the forged design provides a structure suited to the demands of motocross. This part is particularly suitable for restorations or modifications where oversize C (Ø 96.98 mm) is required.

Common compatibilities: YAMAHA YZ 450 F (2026), FANTIC XXF 450 (2024), YAMAHA WR 450 F (2024). Always check the engine reference and piston cone before installation to ensure fit and safety on the track.

Technical information :

Reference

WO00371A / 1122777003

Oversize

+0,02

Rings Quantity

Compression Ratio

13,0:1

Diameter Ø (mm)

96,98

Engine

Piston diameter