I have a 1965 honda dream and i need 2 get a set of pistons and rings..the pistons that came out of is have ART on one side of them and cb77 on the other side..these markings are on each side where the ristpins go..the only other markings on them os a number 5 stamped on the inside..the manuals that i have and have read say that the size should be stamped on the top of the crown of the piston,,,and there isnt no markings there...the manual also said to look on the gap of the ring where the STD is there should be a .25,,,.50,,,,,.75,,,,.100...there are none of these markings and i dont want o get the wrong parts for my bike...any feedback would be greatly appreciated...thank you and have a good day..