Wossner Full forged size A Piston kitRef : 8631DA / 1093775001

WÖSSNER Pro Series Forged Piston – Manufacturer Ref. 8631DA

Manufactured in Germany by engine part specialists for 2 and 4-stroke engines, this Wössner forged piston is aimed at cross preparations and 450 cm3 displacements seeking a robust and precise component. Made from high-quality aluminium with an anti-friction treatment on the skirt, it withstands the stresses of intensive use while facilitating fitting and running-in.

• Type: forged piston
• Compression: high compression
• Bore diameter: 95.00 mm
• Piston diameter: Ø 94.960 mm (oversize A)
• Material: aluminium
• Supplied with: ring(s), circlips, and pin

Ideal for prepared cross engines, this piston fits configurations requiring an oversize A to accommodate a fresh bore. Its treated skirt limits friction and contributes to a consistent engine behaviour during warm-up and high revs. Assembly and clearance checks are essential to ensure optimal operation.

Common compatibilities: YAMAHA WR 450 F (DJ03, CJ13) and YAMAHA YZ 450 F (CJ10) — check the reference and dimensions before installation.