being given a honda cb 250rs,an import, to rebuild. my research over these 3 weeks show they are thirsty for oil. this posed a problem to the previous owner which caused him to offload it.though it is my good fortune i would be interested to know the best way to sourse rings, gaskets ect for this make,year& model.Secondly are other non import models that would have part that would swap over nicely to the cb250 rs?Any assistance will be gr8ly appreci8ted