ProX Piston Kit for Honda CR125R, 53.97 mm (01.1218.A4)

The PROX 01.1218.A4 Piston Kit is a precision-engineered OEM replacement solution for Honda CR125R applications. Manufactured in Japan, this kit is designed to meet or exceed original equipment specifications, providing dependable fitment and performance for engine rebuilding, maintenance, or restoration projects. The piston is manufactured from a high-silicon-content aluminum alloy for strength, durability, and consistent operation under demanding conditions.
CNC machining brings the piston to extremely close tolerances, supporting accurate fitment and reliable engine performance. The kit includes the essential components needed for installation: one piston, a piston ring kit, a wrist pin, and circlips. This comprehensive configuration helps simplify the replacement process while ensuring the major piston assembly components are matched for proper operation.
The PROX piston kit is suited for riders, technicians, and powersports professionals seeking a quality replacement for a Honda CR125R engine. Verify vehicle compatibility and application details before installation, and follow the manufacturer’s service procedures for piston clearance, ring placement, wrist pin installation, and circlip retention. The 53.97 mm piston size and PROX part number 01.1218.A4 make this kit easy to identify when selecting replacement engine components.

Features:

• Manufactured in Japan for consistent quality and precision

• OEM replacement design for Honda CR125R applications

• Cast from high-silicon-content aluminum alloy

• Meets or exceeds OEM specifications

• CNC-machined to extremely close tolerances

• Kit includes piston, ring kit, wrist pin, and circlips

• Piston size: 53.97 mm

Ships from Parts Unlimited.