Duke of Oil: 1976 Yamaha RD400C

By Dain Gingerelli
Published on October 4, 2018
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Photo by Dain Gingerelli
1976 Yamaha RD400C.

1976 Yamaha RD400C

  • Engine: 399cc air-cooled 2-stroke parallel twin, 64mm x 62mm bore and stroke, 6.2:1 compression ratio, 35.48hp @ 7,000rpm (rear wheel, Cycle dyno)
  • Top speed: 95mph (period test)
  • Carburetion: Two 28mm Mikuni w/Yamaha Autolube oil injection
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