Yamaha XS400 DOHC
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| Yamaha XS400 | |
| Manufacturer | |
|---|---|
| Also called | XS400 US. Custom, XS 400 US. Custom, XS400SE, XS 400 SE, XS400 DOHC (reduced effect), XS 400 DOHC (reduced effect), XS400 DOHC, XS 400 DOHC, XS400 Special, XS 400 Special, XS 400 |
| Production | 1982 - |
| Class | Standard |
| Engine | Four stroke, parallel twin, DOHC, 2 valves per cylinder |
| Compression ratio | 9.7:1 |
| Ignition | Transistorized |
| Transmission | 6 Speed |
| Frame | Pressed steel spine with engine as stressed member |
| Suspension | Front: Hydraulic telescopic forks Rear: Monocross system with single coil sprung, gas/oil damped shock, pre-load adjustable |
| Brakes | Front: Single 10.5 in disc Rear: Drum |
| Front Tire | 3.00-18 |
| Rear Tire | 4.10-18 |
| Wheelbase | 54.1 in |
| Seat Height | 30.9 in |
| Weight | kg / 366 lbs (dry), |
| Recommended Oil | Yamalube 10w-40 |
| Fuel Capacity | 17 Liters / 4.4 US gal |
| Manuals | Service Manual |
Engine[edit | edit source]
The engine was a Air cooled cooled Four stroke, parallel twin, DOHC, 2 valves per cylinder. The engine featured a 9.7:1 compression ratio.
Drive[edit | edit source]
Power was moderated via the Wet, multiplate.
Chassis[edit | edit source]
It came with a 3.00-18 front tire and a 4.10-18 rear tire. Stopping was achieved via Single 10.5 in disc in the front and a Drum in the rear. The front suspension was a Hydraulic telescopic forks while the rear was equipped with a Monocross system with single coil sprung, gas/oil damped shock, pre-load adjustable. The XS400 DOHC was fitted with a 17 Liters / 4.4 US gal fuel tank. The bike weighed just kg / 366 lbs. The wheelbase was 54.1 in long.
Photos[edit | edit source]
Overview[edit | edit source]
Yamaha XS 400
| Make Model | Yamaha XS 400 DOHC |
|---|---|
| Year | 1982 - |
| Engine Type | Four stroke, parallel twin, DOHC, 2 valves per cylinder |
| Displacement | 399 cc / 24.3 cu-in |
| Bore X Stroke | 69.0 x 53.4 mm |
| Cooling System | Air cooled |
| Compression | 9.7:1 |
| Lubrication | Wet sump |
| Induction | 2x 32mm Mikuni carburetors |
| Ignition | Transistorized |
| Starting | Electric |
| Max Power | 45.5 hp / 34 kW @ 9500 rpm |
| Max Torque | 3.5 kgf-m / 25.3 lb-ft @ 8000 rpm |
| Clutch | Wet, multiplate |
| Transmission | 6 Speed |
| Final Drive | Chain |
| Frame | Pressed steel spine with engine as stressed member |
| Front Suspension | Hydraulic telescopic forks |
| Front Wheel Travel | 138 mm / 5.5 in |
| Rear Suspension | Monocross system with single coil sprung, gas/oil damped shock, pre-load adjustable |
| Rear Wheel Travel | 96.5 mm / 3.8 in |
| Front Brakes | Single 10.5 in disc |
| Rear Brakes | Drum |
| Front Tire | 3.00-18 |
| Rear Tire | 4.10-18 |
| Rake | 63° |
| Trail | 95 mm / 3.74 in |
| Wheelbase | 54.1 in |
| Seat Height | 30.9 in |
| Ground Clearance | 5.9 in |
| Dry Weight | kg / 366 lbs |
| Fuel Capacity | 17 Liters / 4.4 US gal |