Someone I work for has an old Kawasaki OHC 400 I took a interest in. I need help identifying the year and a price range for its condition. Needs new tires,seat, and probably more. You can see some parts are not original. Not sure the condition of the gas tank but I was told the bike was running when it was parked(Not sure how long ago, Owner passed away). What does OHC stand for? whats the difference between KZ and OHC if any. As it sits what would you pay?