PISTON KIT 2021-22 KX250 Kawasaki 77.96mm, PROX 01.4351.A
Piston kit with a 77.96mm bore. ProX pistons are precision machined on the latest CNC equipment using a low-expansion, low-friction piston alloy, similar to that used by major Japanese engine manufacturers. This kit is a high-quality replacement for original pistons. Many ProX pistons feature a tin coating to assist the wear-in process and a new skirt coating that reduces friction after wear-in, ultimately increasing performance. Part number PROX 01.4351.A.
- SKU
- 56-W8820.A.PX
- Brand
- Pro-X Racing
- Availability
- In Stock (7)
FULL DESCRIPTION
ProX Piston Kit - Precision Engineered for Performance
This ProX Piston Kit is engineered for precision and performance, offering a high-quality replacement for your engine's original piston. Manufactured using advanced CNC equipment, ProX pistons utilize a low-expansion, low-friction alloy, the same type favored by major Japanese engine manufacturers.
Key Features:
- High-Quality Material: Constructed from a premium low-expansion, low-friction piston alloy for optimal performance and durability.
- Advanced Coating Technology: Many ProX pistons feature specialized coatings. This kit includes an OEM-style tin coating that aids the crucial wear-in process after initial engine start-up.
- Friction Reduction: A newly developed skirt coating not only assists in the wear-in phase but also actively reduces friction for improved engine efficiency and increased performance.
- Precision Machining: Manufactured on state-of-the-art CNC equipment for exact tolerances and a perfect fit.
- Direct Replacement: A first-class solution designed to seamlessly replace the original piston in your powersport vehicle.
This piston kit has a bore size of 77.96mm.


