The Wossner WO-3509-DA Forged Piston Kit is a Premium Series high-compression piston designed for selected Honda CRF250R, CRF250RX and CRF250R Works Edition four-stroke off-road motorcycles. Manufactured from high-strength forged aluminium, it features Wossner’s Double Bridge Forging construction for increased strength and piston stability under demanding motocross and competition conditions.

Featuring a 78.96 mm piston diameter, 79.00 mm standard cylinder bore, 50.90 mm stroke compatibility, 18.36 mm compression height and a 14.8:1 compression ratio, this piston is engineered for high-performance race applications. The two-ring design provides effective sealing, while the DLC-coated 16 mm wrist pin supports durability under high engine loads.

Premium Series forged piston kit
Honda CRF250R Works Edition
78.96 mm finished piston diameter
79.00 mm standard cylinder bore
14.8:1 compression ratio
50.90 mm stroke compatibility
18.36 mm compression height
Double Bridge Forging construction
Two-ring piston design
16 mm DLC-coated wrist pin
Requires a minimum 0.8 mm squish clearance
Maximum recommended service life of five operating hours
Includes piston, piston rings, wrist pin and retaining clips

Important: This is a high-compression competition piston with a maximum recommended service life of five operating hours. A minimum squish clearance of 0.8 mm is required. Always confirm the motorcycle model, year, cylinder measurements, piston-to-cylinder clearance and engine setup before ordering or installation. Professional engine assembly and clearance checking are strongly recommended.

Notice: Product images may differ from the actual product. Images are provided for illustration purposes only and may show a representative item rather than the exact part supplied.