The Yamaha SR400SP motorcycle was produced in 1979 and is a four stroke, single cylinder engine with a capacity of 399 cc. Its compression ratio is 8.5:1 and it features air cooling, a BSR33 carburetor and a wet, multiple disc clutch. The transmission is a 5 speed chain drive and the frame is made of steel double cradle. The front suspension consists of a 35mm telescopic fork and the rear suspension is dual shocks with 5-way adjustable preload. The front wheel travel is 150 mm and the rear wheel travel is 105 mm. The motorcycle has a single disc front brake and drum rear brake with a wheelbase of 1410 mm and a seat height of 790 mm. The fuel capacity is 12 litres and wet weight is 174 kg. The Yamaha SR400SP has a maximum power of 27 hp (17.1 KW) at 7000 rpm and a maximum torque of 27.4 Nm (6.3 kgf-m) at 6500 rpm. It has a front tyre size of 3.50-19 and a rear tyre size of 4.00-16 with a rake caster angle of 27 o and a trail of 111 mm. The ground clearance is 130 mm.
Technical specifications:
Make Model: Yamaha SR 400SP
| Year | 1979 |
|---|---|
| Engine | Four stroke, single cylinder, SOHC, 2 valves per cylinder. |
| Capacity | 399 cc / 24.3 cu-in |
| Bore x Stroke | 87 67.2 mm |
| Compression Ratio | 8.5:1 |
| Cooling System | Air cooled |
| Oil Capacity | 2.4 Litres |
| Lubrication | Dry sump |
| Induction | BSR33 carburetor |
| Ignition | CDI |
| Starting | Kick |
| Max Power | 27 hp / 17.1 KW @ 7000 rpm |
| Max Torque | 27.4 Nm / 6.3 kgf-m @ 6500 rpm |
| Clutch | Wet, Multiple Disc |
| Transmission | 5 Speed |
| Final Drive | Chain |
| Frame | Steel Double Cradle |
| Front Suspension | 35mm Telescopic fork |
| Front Wheel Travel | 150 mm / 5.9 in |
| Rear Suspension | Dual shocks, 5-way adjustable preload |
| Front Wheel Travel | 105 mm / 4.1 in |
| Front Brakes | Single disc |
| Rear Brakes | Drum |
| Front Tyre | 3.50-19 |
| Rear Tyre | 4.00-16 |
| Rake Caster Angle | 27 o |
| Trail | 111 mm / 4.4 in |
| Wheelbase | 1410 mm / 55.5 IN |
| Seat Height | 790 mm / 30.9 in |
| Ground Clearance | 130 mm / 5.1 in |
| Wet Weight | 174 kg / 384 lbs |
| Fuel Capacity | 12 Litres / 3.2 gal |
