Naked Motorcycles

2003Triumph Bonneville

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The 2003 Triumph Bonneville is a retro-styled 790cc twin that appeals to riders seeking classic British character with modern reliability. Known for its distinctive parallel-twin engine delivering smooth mid-range torque and timeless styling, it excels as an accessible everyday roadster for enthusiasts valuing heritage and manageable performance over raw speed.

Capacity: 790.0 ccm
Engine: Parallel Twin, four-stroke
Gearbox: 5-speed
Dry weight: 205.0 kg
Seat height: 775 mm
Power: 62.0 HP (45.6 kW) @ 7400 RPM

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What’s new for the 2003 Triumph Bonneville

vs the 2002

Spec	2002	2003
Power	61.0 HP (44.9 kW) @ 7400 RPM	62.0 HP (45.6 kW) @ 7400 RPM

Other years 1986 1987 1988 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016

How it rides

Editorial estimate from the spec sheet - not lab tested

Off-road & trail10%

Cornering55%

City riding65%

Daily riding68%

Touring45%

Two-up40%

Track20%

Best for: Best suited to relaxed street riding, café-racer style cruising, and short scenic rides rather than outright performance.
Built for: A classic-styled retro roadster that prioritizes timeless looks, mellow torque, and easygoing manners over speed or sharpness.
Not ideal for: Not a good fit for riders wanting high-speed touring, aggressive cornering performance, or any off-road capability.

Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.

Will it fit you?

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Your height

Inseam (optional)

Units

At 775mm, a rider of 68.9" with a 31" (estimated) inseam will reach the ground with both feet flat on the 2003 Triumph Bonneville, with a relaxed knee angle of around 120 degrees and a forward-leaning riding position.

Assumes about 30mm of suspension sag once seated. This is an approximation from category-typical geometry, not a measurement of this bike or of you - sit on one before you buy.

More bikes at 751-820 mm — Middle Ground →

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Full specifications

Engine

Capacity: 790.0 ccm
Power: 62.0 HP (45.6 kW) @ 7400 RPM
Torque: 60.0 Nm (6.1 kgf-m)
Engine type: Parallel Twin, four-stroke
Power/weight ratio: 0.3024 HP/kg (dry)
Bore x stroke: 86.0 x 68.0 mm
Compression: 9.2:1
Cooling system: Air
Fuel system: Carburettor
Starting: Electric
Ignition: Digital - inductive type
Valves per cylinder: 4

Transmission

Gearbox: 5-speed
Transmission type: Manual
Final drive: Chain
Clutch: Wet. multi-plate

Dimensions & weight

Wheelbase: 1493 mm
Overall length: 2250 mm
Overall width: 860 mm
Overall height: 1105 mm
Seat height: 775 mm
Dry weight: 205.0 kg
Wet weight: 226.0 kg
Fuel capacity: 16.00 litres

Chassis & suspension

Frame: Tubular steel cradle
Front suspension: 41mm forks
Rear suspension: Chromed spring twin shocks with adjustable preload
Front wheel travel: 120 mm
Rear wheel travel: 105 mm
Rake (fork angle): 28.0°

Brakes & wheels

Front brakes: Single disc
Front brakes diameter: 310 mm
Rear brakes: Single disc
Rear brakes diameter: 255 mm
Front tyre: 100/90-R 19
Rear tyre: 130/80-R 17

Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.

What changed, year to year

Differences highlighted

Specification	1986	2002	2003	2007	2011	2016
Capacity	744 cc	790 cc	790 cc	865 cc	865 cc	865 cc
Dry weight	—	205 kg	205 kg	205 kg	206 kg	209 kg
Seat height	—	775 mm	775 mm	775 mm	739 mm	740 mm
Fuel capacity	11 L	16 L	16 L	16.7 L	15.9 L	16 L