Beta RR 390 4 T Race [2025-2026] - WÖSSNER forged piston kit

WÖSSNER forged piston kit for Beta RR 390 4 T Race

The WÖSSNER forged piston kit is designed for the Beta RR 390 4 T Race built in 2025-2026. It bundles the components intended for piston use and offers a clearly defined selection for renewal in the upper engine area.

Function and execution

The piston is made of aluminum and is forged. The standard piston compression and compression ratio of 12.7:1 correspond to the specified configuration. With the designated 4T insert, the kit is tailored to the four-stroke engine mentioned.

• Forged aluminum piston
• Standard piston compression
• Piston diameter: 87.97 mm
• Oversize letter: B
• Oversize: +0.01
• Bore diameter: 88.01mm
• Piston ring set as a set

Kit contents

The kit includes the piston, piston rings, piston pins and safety clips. This means that the piston components included in the product scope are included in a common compilation.

Vehicle assignment

The kit is the Beta RR 390 4T Race in the full year range 2025–2026 assigned. The selection should be based on this model and year of manufacture.

Technical data

• Brand: WOSSNER
• Piston type: forged
• Material: aluminum
• Compression ratio: 12.7:1
• Displacement configuration: 4T