Yamaha RD 400 (1977)
Comparison technical specifications
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| Make: | Yamaha |
| Model: | RD 400 |
| Years: | 1977 |
| Engine: | Two stroke, parallel twin cylinder, reed-valve torque induction |
| Capacity: | 398 cc / 24.2 cu-in |
| Bore x Stroke: | 64 х 62 mm |
| Cooling System: | Air cooled |
| Compression Ratio: | 6.2:1 |
| Lubrication: | Autolube |
| Induction: | 2x 28mm Mikuni carburetors |
| Ignition: | Battery, dual coils, breaker points |
| Starting: | Kick |
| Max Power: | 44 hp / 32.3 kW @ 7500 rpm |
| Max Torque: | 41.1 Nm / 4.2 kgf-m @ 7000 rpm |
| Clutch: | Wet multiplate |
| Transmission: | 6 Speed |
| Final Drive: | Chain |
| Front Suspension: | Telescopic forks |
| Rear Suspension: | Swing arm, dual shocks |
| Front Brakes: | Single 267mm disc |
| Rear Brakes: | Single 267mm disc |
| Front Tyre: | 3.00S-18 |
| Rear Tyre: | 3.50S-18 |
| Dimensions: | Length 1995 mm / 78.5 in Width 760 mm / 3.0 in Height 1060 mm / 41.7 in |
| Wheelbase: | 1320 mm / 51.9 in |
| Seat Height: | 800 mm / 31.4 in |
| Ground Clearance: | 150 mm / 5.9 in |
| Dry Weight: | 165.5 kg / 364.8 lbs |
| Wet Weight: | 171 kg / 376 lbs |
| Fuel Capacity: | 16.5 Litres / 4.3 US gal |
| Consumption Average: | 43 mpg |
| Standing ¼ Mile: | 14.1 sec / 90.1 mph 145 km/h |
| Top Speed: | 172 km/h / 106.8 mph |