PISTON KIT 13-21 BETA RR250 Enduro 66.40, PROX 01.7313.B
ProX 2-ring piston kit with a bore of 66.40mm (B. 66.35mm). This kit includes piston rings, wrist pin, and circlips. ProX pistons are precision machined using state-of-the-art CNC equipment and are made from a low-expansion, low-friction piston alloy utilized by major Japanese engine manufacturers. Features an OEM-style tin coating to aid in the break-in process. PROX 01.7313.B.
- SKU
- 56-W9857.B.PROX
- Brand
- Pro-X Racing
- Availability
- In Stock (4)
FULL DESCRIPTION
ProX 2-Ring Piston Kit
This ProX Piston Kit is engineered for optimal performance and durability. It features a precision-machined piston designed for low expansion and low friction, utilizing the same high-quality alloy preferred by major Japanese engine manufacturers. The kit includes everything needed for installation: piston rings, wrist pin, and circlips.
To ensure a smooth and efficient break-in period, the piston is treated with an OEM-style tin coating.
- Type: 2-ring piston
- Diameter: 66.40mm
- Includes: Piston rings, wrist pin, and circlips
- Material: Low-expansion, low-friction piston alloy
- Coating: OEM-style tin coating for assisted break-in
- Manufacturing: Precision machined on state-of-the-art CNC equipment


