Beta RR 390 4 T X-PRO [2025-2026] - Complete Top End Kit - Replica forged pistons

VERTEX Top End Kit with forged piston for Beta RR 390 4 T X-PRO

The VERTEX complete kit for the upper engine area supports the engine overhaul of the Beta RR 390 4 T X-PRO. It brings together the relevant components for replacing pistons, piston rings and seals in the upper engine area. With this four-stroke version, a timing chain is also included in the kit.

Function and execution

The forged aluminum piston is designed for standard piston compression. With a diameter of 87.97mm, the oversize letter B and an oversize of +0.01, the kit is specified for a bore diameter of 88.00mm. The version is intended for 4T engines.

Scope of delivery

• Forged aluminum piston
• Piston rings in a set
• Piston pin
• safety clips
• Top end gasket kit
• Timing chain for the four-stroke version

Vehicle assignment

The top end kit is assigned to the Beta RR 390 4 T X-PRO built in 2025-2026.

Technical data

• Brand: VERTEX
• Piston Type: Forged
• Material: aluminum
• Piston compression: standard
• Diameter Ø: 87.97 mm
• Letter oversize: B
• Oversize: +0.01
• Bore diameter: 88.00 mm
• Displacement/engine version: 4T