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jkv45 the Kenny Roberts signature RZ350! Way cool. Back up 3 generations, I had a 1972 R5 350 2 stroke, 5 speed. ...previous generation to the old but very popular RD350 air cooled 6 speed. Yamaha sold a pantload of the RD's.
Have spare spark plugs and a wrench with you.....always. Sorry, I'm showing my age here.