more heat is generated in working of engine so its piston ring war out and cut mark appears on the ring surface.
You have to disassemble the entire engine, remove the piston and check the rubber ring around that piston.
You mean a piston ring. It seals the gap between the piston and the chamber in your engine
If you only use one piston ring on 80cc bike engine, the compression ration will be reduced.
yes
Yes, the material, thickness and possibly style of piston ring(top ring) can be different.
On the pistons, in the block. If they are bad, it's time for an engine rebuild.
Because of Ring burnt, engine heat-up or loose piston in sleave.
The three main functions of piston rings in reciprocating engines are:Sealing the combustion/expansion chamber.Supporting heat transfer from the piston to the cylinder wall.Regulating engine oil consumption.
The only way to "check" a piston would be to remove it and visually inspect for damage and wear.Make certain that the piston is not cracked or otherwise damaged.check the ring grooves. Use a piston ring and a set of feeler gauges to determine the amount of wear. Excessive ring groove wear can result in piston failure and if the piston shatters, it can cause the engine to fail completely.Next, use a micrometer to determine the difference in the diameter of the piston between the top and bottom. The piston will wear and if the difference between the top and bottom is too great, the engine will exhibit "piston slap".Check the fit of the wrist pin, it should be tight.HOWEVERYou can run a compression test and get a good idea whether the piston is functioning somewhat correctly.
Valve, valve spring, piston, piston ring, cylinder wall, head, headgasket, diluted oil, stuck injector,
Engine (Piston) speed and things like ring drag
The numbers like .75 .50 indicate the oversize of the piston ring that will be used for repair. For instance if the engine has a diameter of 70 mm and you need to open the cylinder bore for repair in .50 mm, you need to use one piston ring with diameter 70.50 mm.