Compression Ratio verses Compression test results

Thanks a lot RRRR,that bike is gorgeous,now I know how much rubbing I have to do. I've now got new inlet and exhaust valves, cam chain tensioner, loads of other parts some 20yrs + old but perfect condition, all in sealed plastic bags with the Kawa part number paper inside.Takes a lot of searching but [when] I end up with an almost stock example I'm donating it to the National Motorcycle Museum here in England when I get too old to ride it 'cos it burnt down a few years ago.Piccys eventually. Regards and Thanks again for the info. Incidently, the KZ500 A1 came first in 1979, the KZ550's were developed from it and produce 1hp less than the 500! Also, the 500 is credited with a higher top speed than the 550B)

77KZ650.Thanks for the link,I now feel more confident that piston/ring replacement is needed.Because I've stripped it completely[and a gasket set costs the national debt:angry: ]I have to decide correctly every time I consider a component for replacement,so I'm just replacing all bearings,seals etc. Only safe way to go really.Regards from England;)

Willo, your explanation helps enormously, Thanks a lot for the infoB)

I know how you feel, I had to study advanced Calculus while reading Microelectronics and then apply it to real world problems.One I remember concerned a motorcycle which had been tweaked to produce 20% more power.The question required Mathematical manipulation of the rates of heat losses etc and confirmed the thing wouldn't overheat....:blink: :woohoo: Quite an amazing tool really.Thermodynamics? I'm off to bed.!!!! Regards from England.