Bought this 72 cb 750 , guy i bought it from "rebuilt" it . I could tell it had all new gaskets in it and it was cheap enough. It was not rideable as it was apart and he was only using frame to hold engine to run. He said it was using lots of oil, he also said he left expanders out of oil rings?
So me and my 5 year old and my almost 2 year old told the engine down and found that 3 of 4 cyl's had the compression rings were almost lined up, not at 120 degree apart also had 1 piece oil ring,not a 3 piece oil ring set. He had given me the box rings came in, hastings 6971 in it were a wave type expander? looks like stock pistons he cleaned up and decent hone on cylinders. I have not been able to mic bores or pistons yet. My question is are these supposed to be 3 piece oil ring? Are the 1 piece rings an upgrade and if so do these wave like expanders go behind 1 piece oil ring? Once i know for sure standard bore, should i order oem oil rings? ring gap was roughly 15 thousands book says less than 28 thou ok , what is min. ring gap? Thanks in advance, leaving with family camping, check in later.
