Description
Polini Piston Circlips "W" aluminium Big Bore MBK 51, for cylinder kits with 13mm piston pin. Always keep some of them in store, they have a tendency to get bent and thus become useless.
- 1x W-circlip
- for 13mm piston pin
- for vintage MBK 51, AV-10, 95GT
Function of circlips
Circlips or retaining clips are small, C-shaped metal parts that hold components on an axle or shaft.
The clips are usually placed in a groove or notch in the axle or shaft to prevent the part from moving or popping out. Piston circlips secure the piston pin to the piston.
We recommend using circlip pliers or a piston clip installation tool to install the circlip.
Aluminium cylinders
Aluminium cylinders are more powerful than cast iron cylinders, but require more regular maintenance and must be combined with different components such as a reinforced crankshaft and a larger carburetor.
How to run in an aluminium cylinder?
Aluminium cylinders should be run in for about 200 kilometers , and you should use a fully synthetic engine oil.
Note: To ensure optimum performance and reliability, it is advisable to measure the squish clearance. Just have a look at our tutorial How to adjust squish clearance.