Standard piston ring set for the stock / standard bore on many of the Honda 90cc models. If you're just freshening up your top end and having the cylinders honed, install a fresh set of rings to ensure a tight fit. Make sure to stagger the ring gaps according to the manual.
Set comes with 4 rings and the oil ring spacer.
Be very careful when installing the cylinder over new rings, it's helpful to have the proper tool to keep the rings compressed as you lower the cylinder over the pistons. Try to use only plastic tipped tools to prevent from scratching aluminum surfaces.
Replaces Honda Part Number: 13011-121-762
Top Compression Ring (silver outer rim)
Second Ring (black outer rim)
Bottom Rings (3 pieces - Spacer in the middle - 1 thin wiper ring on either side)
ATC90 - 1970-1978
CL90 Scrambler - 1967-1969
CM91 - 1966-1969
CT90 Trail - 1966-1979
S90 Super - 1964-1969
SL90 Motosport - 1969
ST90 Trailsport - 1973-1975