Piston rings for the 150 cc CG engine (162 FMJ), diameter 62 mm. A set for one piston: compression rings and an oil control ring.
- Replace them if compression has dropped, oil consumption is up, and the exhaust is smoky.
- Before installing, check the ring end gap in the cylinder; when assembling, space the ring gaps around the circumference of the piston.
If the cylinder has been bored, oversize rings are needed. After replacing the rings, do a break-in.
