The 1982 Yamaha XJ400 Maxim motorcycle has a four-stroke, parallel twin DOHC engine with two valves per cylinder and a capacity of 399 cc. It has a compression ratio of 9.7:1 and is air-cooled with wet sump lubrication. The bike features 2x 32mm Mikuni carburetors, a transistorized ignition, and an electric starter. The maximum power output is 45.5 hp at 9500 rpm while the maximum torque produced is 3.5 kgf-m at 8000 rpm. The XJ400 Maxim has a wet, multi-plate clutch and a six-speed transmission with chain final drive. The frame is pressed steel spine with the engine as a stressed member. The front suspension is hydraulic telescopic forks with a front wheel travel of 138 mm, while the rear suspension is the monocross system with a single coil sprung, gas/oil-damped shock that is pre-load adjustable and has a rear wheel travel of 96.5 mm. The bike also comes equipped with a single 10.5 in disc front brake and a rear drum brake. It runs on a 3.00-18 front tire and a 4.10-18 rear tire with a rake of 63 degrees and a trail of 95 mm. The bike has a wheelbase of 54.1 in, a seat height of 30.9 in, a ground clearance of 5.9 in, and a dry weight of 366 lbs. The fuel capacity is 17 litres or 4.4 US gallons.
Technical specifications:
Make Model: Yamaha XS 400 Maxim
| Year | 1982 – |
|---|---|
| Engine | Four stroke, parallel twin, DOHC, 2 valves per cylinder |
| Capacity | 399 cc / 24.3 cu-in |
| Bore x Stroke | 69.0 x 53.4 mm |
| Cooling System | Air cooled |
| Compression Ratio | 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 Tyre | 3.00-18 |
| Rear Tyre | 4.10-18 |
| Rake | 63 degrees |
| 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 Litres / 4.4 US gal |
