Description
Beta 390 RR Piston
The ProX brand is synonymous with quality and offers a wide range of spare parts for a variety of motocross models. In most cases, these are not performance-enhancing parts, but they have the same properties as the original parts.
ProX pistons
- Cast aluminum (gravity cast)
- Cast and CNC machined
- High thermal stability
- Different dimensions available for each motorcycle
Dimensions:
- Dimension: A
- Bore: 87.96 mm
Useful note: For optimum performance, measure the cylinder beforehand to ensure that it meets the piston/cylinder clearance recommended by the manufacturer by selecting the correct piston size.
When to replace the piston?
To find out when the piston on your motorcycle, scooter or moped needs to be replaced, it's best to check your bike's manual. You can also keep an eye out for certain symptoms such as loss of compression, loss of power or oil consumption (only for a four-stroke piston).
Extending Piston life
To extend the life of the piston and reduce cylinder wear, it is recommended that you replace the piston rings on an alternating basis. This method maximizes piston life and improves engine performance.
It is important that you replace cylinder gaskets and piston circlips each time you disassemble the cylinder and piston. Failure to do so can result in oil leaks and engine damage.