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MotoLibrary Score
45/100Balanced
Power/Weight
0.27 hp/kg
Torque
59 Nm
Engine
649 ccm
Technical Overview
2021 Kawasaki Z650L SE Technical Analysis & Specification Breakdown
Built around Kawasaki's naked motorcycle platform, the 2021 Kawasaki Z650L SE features a 649 cc (39.6 cu in) liquid-cooled twin, four-stroke configuration. In factory specification, peak output is rated at 50.7 HP (37 kW) at 8,000 rpm while maximum torque reaches 59 Nm (43.5 lb-ft) at 6,500 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 78.1 HP per liter and a 1,500 rpm working window between peak torque (6,500 rpm) and peak power (8,000 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 Z650L SE measures 187 kg (412 lbs) wet (curb), translating to a power-to-weight ratio of 0.27 HP/kg (3.69 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 1,410 mm (55.5 in) wheelbase engineered for quick, flickable steering geometry. The 15-liter (4 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Specific Output
78.1 HP/L
Power-to-Weight
0.27 HP/kg (3.69 kg/HP)
Power Band Window
6,500–8,000 rpm
Standover Height
790 mm (31.1 in)
Engine
Displacement649.0 ccm (39.60 cubic inches)
Engine TypeTwin, four-stroke
Engine DetailsDie-cast aluminium cylinder and lightweight coated pistons
Power50.7 HP (37.0 kW)) @ 8000 RPM
Torque59.0 Nm (6.0 kgf-m or 43.5 ft.lbs) @ 6500 RPM
Compression10.8:1
Bore x Stroke83.0 x 60.0 mm (3.3 x 2.4 inches)
Fuel SystemInjection
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
IgnitionTCBI with electronic advance
LubricationForced lubrication, semi and #8209;dry sump
CoolingLiquid
Max RPM12500
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchWet multi-disc, manual
DrivelineSealed chain
Chassis
Frame TypeTrellis, high-tensile steel
Trail100 mm (3.9 inches)
Front SuspensionTelescopic fork
Front Travel125 mm (4.9 inches)
Rear SuspensionHorizontal Back-link with preload adjustment
Rear Travel130 mm (5.1 inches)
Wheelbase1410 mm (55.5 inches)
Wheels & Brakes
Front Tyre120/70-ZR17
Rear Tyre160/60-ZR17
Front BrakesDouble disc. Petal-type rotors with two-piston calipers
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.
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.
