Featured Listing: 1976 Yamaha RD400C

If you bought a mid-size two-stroke Yamaha streetbike in 1975, you got the very, very good RD350. You also got shortchanged, because buyers who waited just a year got the 1976 Yamaha RD400C, which Cycle World lauded as the perfect motorcycle, and which carried way more improvements than a simple displacement bump.  1976 Yamaha RD400…