PISTON KIT 08-11 YZF250 77.00, PROX 01.2409.A, 3-RING
3-RING A Piston KIT 77.00 mm Bore STD Compression 13.5:1. ProX Piston Kits are supplied complete with piston rings, wrist pin, and circlips. ProX pistons are precision machined on the latest, state of the art CNC equipment and use the same low-expansion, low-friction piston alloy all major Japanese engine manufacturers use. Uses an OEM style tin coating to assist the break-in process. Replacement parts: PROX RING SET 02.2402, PROX PIN 04.1644.4, PROX CLIPS 05.1612C. PROX 01.2409.A.
- SKU
- 56-W4952.A.PX
- Brand
- Pro-X Racing
- Availability
- In Stock (1)
FULL DESCRIPTION
ProX Piston Kit - 77.00mm Bore, 3-Ring
This ProX Piston Kit is designed for high-performance and reliability, featuring a 77.00mm bore and a 13.5:1 standard compression ratio. Each kit is ready for installation, including all necessary components for a complete engine rebuild.
ProX pistons are manufactured using advanced CNC machinery, employing a low-expansion, low-friction aluminum alloy that is identical to the material used by major Japanese engine manufacturers. This ensures optimal performance and durability.
The piston features an OEM-style tin coating, which aids in the crucial break-in process of your engine. This coating helps to reduce friction during initial startup, promoting a smoother and more effective break-in period.
This comprehensive kit includes:
- ProX Piston
- Piston Rings (3-ring design)
- Wrist Pin
- Circlips
Replacement parts are available for this kit, including the ProX Ring Set (02.2402), ProX Pin (04.1644.4), and ProX Clips (05.1612C).


