PISTON KIT KXF RMZ 250 77.00 A, PROX 01.4335.A
ProX 4-stroke piston kit with a 77.00mm bore. Includes piston rings, wrist pin, and circlips for ready installation. Pistons are precision machined using a low-expansion, low-friction alloy. Features OEM style tin coating for break-in assistance. Replacement parts: piston rings 02.4334, piston pin 04.1645, piston clips 05.1612C.
- SKU
- 56-W4842.A.PX
- Brand
- Pro-X Racing
- Availability
- In Stock (2)
FULL DESCRIPTION
ProX Piston Kit - 77.00mm Bore
This ProX Piston Kit is designed for high-performance 4-stroke engines, featuring a precise 77.00mm bore diameter. Each kit is supplied ready for immediate installation, including all necessary components: piston rings, wrist pin, and circlips.
ProX pistons are manufactured using advanced CNC equipment, ensuring exceptional precision. They are constructed from a low-expansion, low-friction alloy, identical to the material used by major Japanese engine manufacturers. To aid in the initial break-in period, these pistons feature an OEM-style tin coating, promoting a smooth and efficient start-up process for your machine.
Key Features:
- 77.00mm Bore Diameter
- Complete Kit: Includes Piston Rings, Wrist Pin, and Circlips
- Precision Machined: Utilizes state-of-the-art CNC equipment
- High-Quality Alloy: Low-expansion, low-friction material
- OEM Style Tin Coating: Assists in break-in process
- Direct Replacement Parts
Replacement Parts Available Separately:
- Piston Rings: 02.4334
- Piston Pin: 04.1645
- Piston Clips: 05.1612C


