At the heart of the 1985 Yamaha XJ 600 sport touring motorcycle, Yamaha features a 599 cc (36.6 cu in) air-cooled in-line four, four-stroke configuration. In factory specification, peak output is rated at 50 HP (36.5 kW) at 9,250 rpm while maximum torque reaches 53.9 Nm (39.8 lb-ft) at 7,000 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 83.5 HP per liter and a 2,250 rpm working window between peak torque (7,000 rpm) and peak power (9,250 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the XJ 600 measures 212 kg (467 lbs) wet (curb), translating to a power-to-weight ratio of 0.24 HP/kg (4.24 kg per horsepower). Rider ergonomics and chassis geometry center around a 790 mm (31.1 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,445 mm (56.9 in) wheelbase engineered for balanced agility and highway composure. The 20-liter (5.3 US gal) fuel tank paired with a rated consumption of 5.8 L/100 km provides an estimated theoretical range of roughly 345 km (214 miles) between fill-ups, while factory top speed is listed at 177 km/h (110 mph).
Within MotoLibrary's Yamaha archive, this model family spans 8 indexed model years from 1984 to 1991, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
83.5 HP/L
Power-to-Weight
0.24 HP/kg (4.24 kg/HP)
Power Band Window
7,000–9,250 rpm
Theoretical Range
~345 km (214 mi)
Engine
Displacement599.0 ccm (36.55 cubic inches)
Engine TypeIn-line four, four-stroke
Engine DetailsIn-line four, four-stroke
Power50.0 HP (36.5 kW)) @ 9250 RPM
Torque53.9 Nm (5.5 kgf-m or 39.8 ft.lbs) @ 7000 RPM
Compression10.0:1
Bore x Stroke58.5 x 55.7 mm (2.3 x 2.2 inches)
Valves/Cylinder2
Fuel SystemCarburettor
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
IgnitionCDI
CoolingAir
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchWet multi-plate
Performance
Top Speed177.0 km/h (110.0 mph)
Fuel Consumption5.80 litres/100 km (17.2 km/l or 40.56 mpg)
Greenhouse Gases134.6 CO2 g/km. (CO2 - Carbon dioxide emission)
Chassis
Frame TypeSteel, double cradle
Front SuspensionTelescopic forks
Rear SuspensionMonocross rising rate with 5-way preload
Wheelbase1445 mm (56.9 inches)
Wheels & Brakes
Front Tyre90/90-18
Rear Tyre110/90-18
Front BrakesDouble disc. Two-piston calipers.
Front Brake Ø267 mm (10.5 inches)
Rear BrakesSingle disc. Single-piston caliper.
Rear Brake Ø267 mm (10.5 inches)
Dimensions & Weight
Dry Weight212.0 kg (467.4 pounds)
Weight incl.212.0 kg (467.4 pounds)
Power/Weight0.2358 HP/kg
Seat Height790 mm (31.1 inches) If adjustable, lowest setting.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
