The cylinder with piston is the basis of the piston group: the piston moves in it and compression is created. Fits 125–150 cc 4-stroke scooters. The 57.00 mm size is the cylinder bore. Brand: SEE. Country: Taiwan.
Replacement is needed when compression drops, the cylinder wall is scored, oil consumption is high, there is smoke from the muffler, or the engine is hard to start. Choose by the diameter given in the name.
