Positioned in Kawasaki's naked motorcycle lineup, the 1980 Kawasaki KZ 440 B1 utilizes a 443 cc (27 cu in) air-cooled twin, four-stroke layout. In factory specification, peak output is rated at 40 HP (29.2 kW) at 8,500 rpm while maximum torque reaches 36 Nm (26.6 lb-ft) at 7,500 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 90.3 HP per liter and a 1,000 rpm working window between peak torque (7,500 rpm) and peak power (8,500 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 KZ 440 B1 measures 180 kg (397 lbs) wet (curb), translating to a power-to-weight ratio of 0.22 HP/kg (4.5 kg per horsepower). Rider ergonomics and chassis geometry center around a 40 mm (1.6 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops. The 14-liter (3.7 US gal) fuel tank paired with a rated consumption of 6.5 L/100 km provides an estimated theoretical range of roughly 215 km (134 miles) between fill-ups, while factory top speed is listed at 180 km/h (112 mph).
Specific Output
90.3 HP/L
Power-to-Weight
0.22 HP/kg (4.5 kg/HP)
Power Band Window
7,500–8,500 rpm
Theoretical Range
~215 km (134 mi)
Engine
Displacement443.0 ccm (27.03 cubic inches)
Engine TypeTwin, four-stroke
Engine DetailsTwin, four-stroke
Power40.0 HP (29.2 kW)) @ 8500 RPM
Torque36.0 Nm (3.7 kgf-m or 26.6 ft.lbs) @ 7500 RPM
Compression9.2:1
Bore x Stroke67.5 x 62.0 mm (2.7 x 2.4 inches)
Valves/Cylinder2
Fuel SystemCarburettor. Keihin 36 mm x 2
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionBatery and coil
LubricationForced lubrication (wet Sump)
CoolingAir
Max RPM11000
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchWet multiplate
Performance
Top Speed180.0 km/h (111.8 mph)
0-100 km/h19.70 seconds
60-140 km/h18.00 seconds
Fuel Consumption6.50 litres/100 km (15.4 km/l or 36.19 mpg)
Greenhouse Gases150.8 CO2 g/km. (CO2 - Carbon dioxide emission)
Chassis
Frame TypeTubular double cradle
Rake27.0°
Trail100 mm (3.9 inches)
Front SuspensionTelescopic fork
Rear SuspensionSwing arm
Ground Clearance160 mm (6.3 inches)
Wheels & Brakes
Front Tyre90/90-19
Rear Tyre100/90-18
Front BrakesExpanding brake (drum brake). Internal expansion two-leading
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.
