How to distinguish between the first and second piston rings on a motorcycle?
1 Answers
The white one is the first ring, and the black one is the second ring. The outer circumference of the white ring is a barrel-faced ring (shaped like a barrel), while the outer circumference of the black second ring is a rectangular ring. Engines are high-revving engines with shorter piston strokes, meaning the piston will swing left and right when moving within the cylinder.