Yamaha XJ400 Maxim (1982)

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