The Yamaha RD400F (1978-79) is a two-stroke motorcycle with a parallel twin-cylinder engine that has a capacity of 398cc. It features air cooling with a compression ratio of 6.2:1 and uses Autolube lubrication with reed-valve torque induction. Its ignition is a CDI and starting is via kick. It can produce a maximum power of 44 hp / 32.3 kW @ 7500 rpm and max torque of 41.1 Nm / 4.2 kgf-m @ 7000 rpm. The clutch is wet multiplate with six-speed transmission and chain final drive. The front suspension is a telescopic fork, while the rear suspension has a swing arm with dual shocks. The front and rear brakes have single 267mm discs, with front and rear tires of 3.00S-18 and 3.50S-18, respectively. The dimensions of the bike are length 1995 mm / 78.5 in, width 760 mm / 3.0 in, and height 1060 mm / 41.7 in. It has a wheelbase of 1320 mm / 51.9 in, seat height of 800 mm / 31.4 in, ground clearance of 150 mm / 5.9 in, dry weight of 165.5 kg / 364.8 lbs, and a fuel capacity of 16.5 Litres / 4.3 US gal. Its average consumption is 43 mpg, with a standing 1/4 mile of 14.1 sec / 90.1 mph 145 km/h and a top speed of 106.8 mph 172 km/h.
Make Model: Yamaha RD 400
Year: 1978 – 79
Engine: Two stroke, parallel twin cylinder, reed-valve torque induction
Capacity: 398 cc / 24.2 cu-in
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