2021 Triumph Bonneville Bobber vs 2022 Kawasaki Z 900

Full specifications comparison • 2 motorcycles

Comparing 2 motorcycles
2021 Triumph Bonneville Bobber 2021 Triumph Bonneville Bobber

Naked bike

Engine
Four stoke, parallel twin, 270° crank angle, SOHC, 4 valve per cylinder
Power
57.5 kW / 76.9 hp @ 6100 rpm
Top Speed
N/A
Weight
251 kg / 553 lbs
2022 Kawasaki Z 900 2022 Kawasaki Z 900

Naked bike

Engine
In-line four, four-stroke
Power
92.2 kW / 123.6 hp @ 9500 rpm
Top Speed
N/A
Weight
467.5 pounds
Full Specifications
General
Comments-Power Mode Selection. Traction control. Smartphone Connectivity.
Year20212022
Colours-Pearl Robotic White/Metallic Spark Black, Metallic Matte Twilight Blue/Metallic Spark Black
Make ModelTriumph Bonneville BobberKawasaki Z 900
Warranty-12 Month Limited Warranty
Dimensions
Ground Clearance (in.)-5.7 inches
Ground Clearance (mm)-145 mm
Seat Height690 - 700 mm / 27.2 - 27.6 in820 mm / 32.2 in
Wheelbase1500 mm / 59.1 in1455.4 mm / 57.3 in
Ground Clearance-145 mm / 5.7 in
Height1024 - 1055 mm / 40.3 - 41.5 in1080 mm / 42.5 in
Length1024 - 1055 mm / 40.3 - 41.5 in2070 mm / 81.4 in
Width800 mm / 31.5 in825 mm / 32.4 in
Weights & Capacities
Dry Weight-212 kg / 467.4 lbs
Fuel Capacity12 Litres / 3.2 US gal17 Litres / 4.5 US gal
Wet Weight251 kg / 553 lbs212 kg / 467.5 lbs
Performance
Max Power57.5 kW / 76.9 hp @ 6100 rpm92.2 kW / 123.6 hp @ 9500 rpm
Max Torque106 Nm / 78.2 lb-ft @ 4000 rpm98.6 Nm / 72.7 lb-ft @ 7700 rpm
Power-to-Weight Ratio-0.5832 HP/kg
Engine
Engine Type-In-line four, four-stroke
Fuel Control-Double Overhead Cams/Twin Cam (DOHC)
Displacement1198 cc / 73.1 cu in948 cc / 57.8 cu-in
Engine DetailFour stoke, parallel twin, 270° crank angle, SOHC, 4 valve per cylinderFour stroke, transverse four cylinder, DOHC, 4 valves per cylinder
Fuel System-Injection. DFI with 36mm Keihin throttle bodies
Bore x Stroke97.6 x 80 mm73.4 x 56.0 mm
Compression Ratio10.0:111.8:1
Cooling SystemLiquid cooledLiquid cooled
EmissionsEURO5-
Engine Lubrication-Forced lubrication, wet sump
ExhaustBrushed stainless steel 2 into 2 twin-skin exhaust system with brushed stainless silencers-
Fuel InductionMultipoint sequential electronic fuel injectionFuel injection: 36 mm x 4 with sub-throttle
IgnitionDigitalTCBI with electronic advance
LubricationWet sumpForced lubrication, wet sump
Starter-Electric
Valve System-4
Drivetrain
ClutchWet, multi-plate, torque assist clutchWet multi-disc, manual
Final DriveChainSealed chain
Final Drive Ratio-2.933 (44/15)
Gear Ratios-1st 2.692 (35/13) 2nd 2.059 (35/17) 3rd 1.650 (33/20) 4th 1.409 (31/22) 5th 1.222 (33/27) 6th 1.034 (30/29)
Gearbox-6-speed
Primary Drive-Sealed chain
Primary Drive Ratios-1.627 (83/51)
Transmission / Drive6-Speed6 Speed
Chassis
Frame TypeTubular steel, twin cradle frameHigh-tensile steel trellis
Suspension - Front47 mm Showa cartridge forks41 mm inverted fork with rebound damping and spring preload adjustability
Suspension - RearMono-shock RSU with linkageHorizontal Back-link with rebound damping and spring preload adjustability
Rake25.4°24.5°
SwingarmTwin sided fabrication-
Trail92.0 mm / 3.6 in110 mm / 4.3 in
Wheel Travel - Front90 mm / 3.5 in120 mm / 4.7 in
Wheel Travel - Rear73 mm / 2.8 in140 mm / 5.5 in
Electrical Systems
Instrumentation-TFT Color Instrumentation
Lighting system-LED headlight
Wheels & Brakes
Brakes - Front2x 310mm disc, Brembo 2-piston sliding axial calipers2x 300 mm semi-floating discs, dual opposed 4 piston calipers
Brakes - RearSingle 255mm disc, Nissin single piston sliding axial caliperSingle 250mm petal disc, 1 piston caliper
ABSStandardStandard
Tyres - Front130/90 B16120/70ZR17M/C (58W)
Tyres - Rear150/80 R16180/55ZR17M/C (73W)
Wheels - FrontWire 32-spoke, 16 x 2.5 in-
Wheels - RearWire 32-spoke, 16 x 3.5 in-

Verdict

Winner on specs

2022 Kawasaki Z 900

The 2022 Kawasaki Z 900 edges out the 2021 Triumph Bonneville Bobber thanks to its lighter kerb weight, larger fuel tank, higher rear wheel travel and higher front wheel travel. Specifications are one part of the picture - dealer support, parts availability, and intended use all matter too.

Key Differences

2021 Triumph Bonneville Bobber - Advantages

  • Lower seat height: 690 - 700 mm vs 820 mm - accessible to a wider range of rider heights.
  • Larger displacement: 1198 cc vs 948 cc - more cubic capacity means broader torque delivery and greater low-end pull.

2022 Kawasaki Z 900 - Advantages

  • Lighter: 212 kg vs 251 kg - easier to handle and less fatiguing on long trips.
  • Larger fuel tank: More range between stops - an advantage on touring routes and remote roads.
  • More rear wheel travel: 140 mm vs 73 mm - absorbs bigger hits and rough terrain better.
  • More front wheel travel: 120 mm vs 90 mm - greater compliance over rough surfaces.

2021 Triumph Bonneville Bobber vs 2022 Kawasaki Z 900 - FAQs

What are the engine differences between the 2021 Triumph Bonneville Bobber and 2022 Kawasaki Z 900?
The 2021 Triumph Bonneville Bobber uses Four stoke, parallel twin, 270° crank angle, SOHC, 4 valve per cylinder, while the 2022 Kawasaki Z 900 is powered by In-line four, four-stroke.
Which is lighter, the 2021 Triumph Bonneville Bobber or the 2022 Kawasaki Z 900?
The 2022 Kawasaki Z 900 is lighter at 212 kg compared to 251 kg for the 2021 Triumph Bonneville Bobber - a difference of 39 kg. This is a meaningful difference that affects handling and rider fatigue.
Which bike is better for shorter riders, the 2021 Triumph Bonneville Bobber or the 2022 Kawasaki Z 900?
The 2021 Triumph Bonneville Bobber has the lower seat at 690 - 700 mm, making it more accessible. The 2022 Kawasaki Z 900 sits higher at 820 mm. A seat height below 800 mm suits most riders; above 820 mm shorter riders may need to tiptoe.
Which has the larger fuel tank, the 2021 Triumph Bonneville Bobber or the 2022 Kawasaki Z 900?
The 2022 Kawasaki Z 900 has the larger tank at approximately 17 litres vs 12 litres for the 2021 Triumph Bonneville Bobber. At 5-6 l/100 km that is roughly 283-340 km vs 200-240 km between stops.
Which should I buy, the 2021 Triumph Bonneville Bobber or the 2022 Kawasaki Z 900?
Both are strong choices. The 2021 Triumph Bonneville Bobber has the edge in lower seat height and larger displacement, while the 2022 Kawasaki Z 900 stands out for lighter kerb weight and larger fuel tank. Visit dealers, arrange test rides, and factor in local parts and service costs - these often matter as much as the spec sheet.