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piston rings

  1. 1972 CB 350 twin and a lot of white smoke

    I need professional advice. I bought this beautiful cb 350, with 7ooo miles on it, changed the tires, synced the carbs and it ran great except for in 5th gear, and it would begin to bog down around 70 mph. I was getting on the highway and it began to bog so I let off a bit, as I did that I...
  2. piston rings - '76 CB500T

    What determines whether you need OS or STD rings? Is this based solely on cyl diameter? thanks