Top end engine rebuild kit for the Honda CL90, CT90, S90, and SL90. Time to rebuild? If you're diving in and doing the top end, honing the cylinders and replacing gaskets, this is a great kit to have on hand! The piston rings are for the stock bore.
ISO 9001 100% Non-asbestos gaskets
- 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.
- The Letter stamped on the top two rings should be facing up when installing them and stagger the ring gaps according to the manual.
- All sealing surfaces for gaskets must be clean and flat to make a proper seal, sometimes non-hardening sealant is necessary.
Piston Ring Order:
Top Compression Ring (silver outer rim)
Second Ring (black outer rim)
Bottom Rings (3 pieces - Spacer in the middle - 1 thin ring on either side)
CL90 Scrambler - 1967-1969
CT90 Trail - 1966-1979
S90 Super 90 (CS90) - 1964-1969
SL90 Motosport - 1969