Piston ring from Polini, 70 cc, 47mm x 1.2mm suitable for Minarelli horizontal engines AC.
The main job of piston rings is to seal the combustion chamber against the piston housing and to channel the heat from piston to cylinder. Above this, pistons are also there to regulate the lubrication household, a major function. This means they are always working under pressure, often suffer wear and tear and should be replaced regularly. Loss of compression, lowered performance and poor start reaction are the exact description of worn out piston rings.
The main job of piston rings is to seal the combustion chamber against the piston housing and to channel the heat from piston to cylinder. Above this, pistons are also there to regulate the lubrication household, a major function. This means they are always working under pressure, often suffer wear and tear and should be replaced regularly. Loss of compression, lowered performance and poor start reaction are the exact description of worn out piston rings.
