PISTON KIT 04-07 CRF250R 78.00, PROX 01.1338.B 04-17 CRF250X
ProX pistons are precision machined on CNC equipment using a low-expansion, low-friction piston alloy identical to that used by major Japanese engine manufacturers. This Piston Kit is a solution to replace the original piston. Most ProX pistons come with a special coating. OEM style tin coated pistons assist the wear-in process after initial startup. A new skirt coating reduces friction after wear-in, increasing performance. This kit includes: PROX RING SET 02.1335, PROX PISTON PIN 04.1641.5, PROX CLIPS 05.1612. 78.00mm STD compression 12.9:1.
- SKU
- 56-W4829.B.PX
- Brand
- Pro-X Racing
- Availability
- In Stock (1)
FULL DESCRIPTION
ProX Piston Kit - 78.00mm Standard Compression 12.9:1
Enhance your motorcycle's performance with this high-quality ProX Piston Kit. Precision-machined using the latest CNC equipment, this piston kit is designed to be a premium replacement for your original piston.
Key Features:
- Diameter: 78.00mm
- Compression Ratio: 12.9:1 (Standard)
- Material: Low-expansion, low-friction piston alloy, the same used by major Japanese engine manufacturers.
- Coated for Ultimate Performance: Features a special skirt coating that assists the break-in process and reduces friction after wear-in, contributing to increased performance.
- OEM Style: Designed as a direct replacement for original pistons.
This ProX Piston Kit is a first-class solution for restoring or upgrading your engine.
Replacement Parts Available:
- ProX Ring Set
- ProX Piston Pin
- ProX Clips


