piston wall roughness was made uniform so as to distribute lubrication and friction all parts of the piston thus more durable.

- Surface of the piston head with the machining process that produces RUDENESS PARTICULAR be able to optimize the combustion turbulence (flow of air and fuel is more optimal).
- Homogeneous surface roughness that will facilitate early starter machine.

HOLE CUT OIL wall piston made with a certain degree of slope, so that distribution is more optimal lubrication scavenging residual combustion liner cleaner.

Design FLOW CUT RING upper made with certain degrees, Functioning guarantee piston rings can still move.