ProX Piston Kit 77.98 mm for Honda CRF250R and CRF250X (01.1338.B)

Upgrade the performance and reliability of your Honda CRF250R or CRF250X with the PROX 01.1338.B Piston Kit. Designed as a direct replacement for compatible high-performance four-stroke engines, this complete kit includes the piston, piston rings, wrist pin, and circlips needed for a streamlined installation. Each component is manufactured to support dependable engine operation in demanding motocross and off-road applications.
The PROX piston is precision machined on state-of-the-art CNC equipment to promote consistent fitment, accurate balance, and reliable performance. Its low-expansion, low-friction alloy is engineered to help maintain stable operation across changing engine temperatures while reducing friction between the piston and cylinder wall. This design supports responsive power delivery, durability, and efficient engine performance.
The 77.98 mm PROX piston kit is an excellent choice for routine engine rebuilding, performance maintenance, or restoring compression in a compatible Honda application. Supplied with the essential installation hardware, the PROX 01.1338.B kit helps simplify the rebuild process while meeting the quality standards expected from a trusted aftermarket engine component manufacturer. Verify application and service specifications before installation.

Features:

• Complete piston kit includes piston, rings, wrist pin, and circlips

• Precision machined on state-of-the-art CNC equipment

• Manufactured from a low-expansion, low-friction alloy

• 77.98 mm piston size for compatible Honda engine applications

• Designed for Honda CRF250R and CRF250X models

• PROX part number 01.1338.B

Ships from Parts Unlimited.