Description
The ProX Piston Kit for Kawasaki Ultra 300 X LX 2011 2013 in B size offers an OEM quality replacement option for supercharged four stroke engines whose cylinders fall into the middle of the bore tolerance spectrum. Manufactured largely by Japanese OEM suppliers, this kit brings factory style consistency and durability to the aftermarket. It is a cost effective way to restore compression and performance in a hard working Ultra 300.
- B size piston kit intended for Kawasaki Ultra 300 X LX models with cylinders gauged into the B bore range.
- Kit includes piston, rings, wrist pin, and circlips so engine builders have a matched piston group ready for installation.
- Manufactured to ProX specifications by reputable Original Equipment manufacturers for dimensional and material quality.
- Compatible with appropriate standard and oversize bore arrangements when used within recommended clearances.
- Designed as a direct style replacement for OEM pistons in high performance personal watercraft applications.
This B size piston is ideal for owners who want their Ultra 300 to feel as close to factory fresh as possible after a rebuild, without resorting to non graded or generic components. When combined with proper cylinder preparation, correct ring gap setting, and attention to fueling and cooling, the kit can help deliver smooth, strong power that stands up to extended riding.
Accurate measurement of bore size is essential to selecting the correct graded piston. Work with precise tools, follow Kawasaki’s guidelines, and do a thorough inspection of the crankshaft, bearings, and valvetrain. Install new gaskets and seals, check supercharger health, and adhere to a careful break in process. Used in this way, the ProX B size piston kit can support many more seasons of reliable Ultra 300 performance.
