Here is a new Piston Rings set for many Honda 90cc motorcycles from the 1960's and 1970's. These are Standard size 50mm rings. Rings measure 1.2mm top ring, 1.2mm center ring and 2.5mm thick Oil Ring...so you can always check your own rings too.  An essential tune-up item and hard to find little item for your motorcycle that will help your restoration or keep you bike on the road.  These are correct replacement for Honda Part #'s .13011-121-762, 13010-028-000, 13010-028-025, 13011-102-732, 13010-028-035, 13010-028-020.  Top quality aftermarket item. We look forward to doing business.