Description
The ProX Piston Kit for Yamaha 701 0.50 is a half millimeter oversize piston kit intended for engines where a simple hone or 0.25 mm overbore is no longer sufficient. At this size, the overbore can correct more pronounced wear and scoring while retaining a sensible amount of cylinder wall thickness. ProX engineers this kit to deliver OEM like performance and durability in a wide variety of Yamaha 701 powered skis.
- 0.50 mm oversize piston kit for Yamaha 701 engines requiring a moderate overbore.
- Kit includes oversize piston, rings, wrist pin, and circlips to complete the top end component set.
- Machined from low expansion, low friction alloy on modern CNC equipment for accurate shape and repeatable quality.
- Developed to run at recommended clearances in cylinders bored and honed to the 0.50 mm oversize.
- Suitable for recreational to more aggressively ridden 701 based personal watercraft.
With correct machine work, this ProX kit can restore strong compression, quiet piston operation, and responsive throttle behavior. The ring package is designed for reliable seating and long term sealing when matched to a suitable cylinder finish and proper lubrication. Riders can expect a noticeable improvement in overall engine character compared to a worn or damaged top end.
Engine rebuilds at this level should include thorough inspection of the crankshaft, bearings, seals, and cooling system. Measure all relevant dimensions, replace worn components, and use new gaskets throughout. Follow manufacturer torque, assembly, and break in recommendations carefully. With this approach, the ProX 0.50 mm oversize piston kit can help ensure many more hours of dependable Yamaha 701 performance.
