PISTON KIT 04-07 CRF250R 78 HC, PROX 01.1339.C HI COMP 13.5:1
78.00mm High Compression 13.5:1 Piston Kit. ProX pistons are precision machined on state-of-the-art CNC equipment using the same low-expansion, low-friction piston alloy used by major Japanese engine manufacturers. This kit is a first-class solution to replace the original piston. Many ProX pistons come with an OEM style Tin coating to assist in the wear-in process and a new skirt coating that helps reduce friction after wear-in, increasing performance. PROX RING SET 02.1335. SKU: 56-W4829.C.PXHC. Manufacturer: Pro-X Racing.
- SKU
- 56-W4829.C.PXHC
- Brand
- Pro-X Racing
- Availability
- In Stock (2)
FULL DESCRIPTION
ProX High Compression Piston Kit
This ProX Piston Kit is designed for high-performance applications, offering a significant upgrade over standard pistons. Precision-machined using state-of-the-art CNC equipment, this kit utilizes a low-expansion, low-friction piston alloy, the same type favored by major Japanese engine manufacturers. It represents a premium solution for replacing original pistons in a variety of powersports vehicles.
Key Features:
- High Compression Ratio: 13.5:1 for increased power and performance.
- Optimized Piston Size: 78.00mm bore diameter.
- Advanced Coating: Features an OEM-style Tin coating to aid the initial wear-in process. A specialized skirt coating further reduces friction after break-in, enhancing overall performance.
- Durable Construction: Made from a premium alloy chosen for its low expansion and friction properties.
- Complete Kit: Includes all necessary components for a professional rebuild.
- Replacement Parts Available: Compatible with ProX Ring Set 02.1335.


