Beta RR 390 4 T X-PRO [2025-2026] - Piston Kit

PROX piston kit for Beta RR 390 4 T X-PRO

The PROX piston kit is intended for the Beta RR 390 4 T X-PRO built in 2025-2026. The forged aluminum piston is supplied as a kit with the associated components for piston replacement.

Technical features

• Material: aluminum
• Piston Type: Forged
• Piston compression: standard
• Diameter Ø: 87,960 mm
• Letter oversize: A
• Oversize: STD
• Compression ratio: 12.5:1
• Stroke: 4T
• Specificity: Flat with hollow

Scope of delivery

The kit contains the piston, piston rings, piston pin and circlips. The scope of delivery therefore includes the components specified for the piston set.

Vehicle assignment

The piston set is assigned to the Beta RR 390 4 T X-PRO in the full year range 2025-2026. Before ordering, please compare the vehicle name and technical data of the existing engine with this version.

Execution

The combination of forged design, standard compression, a diameter of 87,960 mm and the compression ratio of 12.5:1 describes the specific PROX version. The markings A, STD and “Flat with hollow” complement the technical specifications of this piston kit.