GAS GAS SM 450 - 2004 Specifications and Reviews

The 2004 GAS GAS SM 450 is a lightweight supermoto designed for riders seeking nimble handling and street-focused performance. Its 399cc liquid-cooled single-cylinder engine delivers responsive power ideal for urban environments and tight cornering, while the 105kg weight ensures exceptional agility. Best known for its aggressive styling and playful character, it appeals to experienced riders who prioritize maneuverability over raw horsepower.

2004
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General information

CategorySuper motard
Year2004
ModelGAS GAS SM 450

Engine and Transmission Specifications

Transmission typefinal driveChain
Gearbox6-speed
Cooling systemLiquid
Fuel controlDOHC
Fuel systemInjection
Bore x stroke95.0 x 62.6 mm (3.7 x 2.5 inches)
Stroke4
Engine typeSingle cylinder
Capacity:399.00 ccm (24.35 cubic inches)
 
 

Physical measures and capacities

Wheelbase1,475 mm (58.1 inches)
Ground clearance340 mm (13.4 inches)
Seat height900 mm (35.4 inches) If adjustable, lowest setting.
Dry weight105.0 kg (231.5 pounds)
 
 

GAS GAS SM 450 dimensions and frame

Rear brakes diameter220 mm (8.7 inches)
Rear brakesSingle disc
Front brakes diameter300 mm (11.8 inches)
Front brakesSingle disc
Rear tyre dimensions150/60-17
Front tyre dimensions120/60-17
Rear suspension travel320 mm (12.6 inches)
Rear suspensionProgressive system, Ohlins shock absorber.
Front suspension travel295 mm (11.6 inches)
Front suspensionMarzocchi inverted fork, 45 mm
Frame typeType deltabox, made of rectangular profile Cr-Mo

Speed and acceleration

Color optionsRed/black/grey
Fuel capacity9.50 litres (2.51 gallons)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay

Performance Profile & Rider Fit

4.5s
0-60 mph (est.)

Best For

Track80%
City70%
Cornering95%
Daily Riding45%
Touring20%
Passenger15%

Rider Profile

Best ForBest suited to intermediate to experienced riders who are comfortable with a light, quick-steering, high-revving single-cylinder machine that demands active input.
PurposeBuilt for supermotard fun: sharp cornering, tight tarmac twisties, and flickable city or track riding rather than covering distance.
Rider FitIts very low dry weight around 105 kg and tall 900 mm seat height suit riders of average to above-average height who want an agile, standing-friendly bike, though the reach to the ground may challenge shorter riders.
CharacterA punchy, minimalist, race-bred single that rewards aggressive, playful riding with immediate direction changes and strong braking feel from its high-spec suspension and brakes.
Not Ideal ForNot a good fit for riders wanting long-distance comfort, wind protection, passenger capability, or a smooth, low-maintenance commuter experience.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2004 GAS GAS SM 450 Rider Ergonomics Assessment

Calculated in your browser only - your height/inseam are never sent to our servers.

Feet:

At 900mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2004 GAS GAS SM 450, with a relaxed knee angle of around 145 degrees and a forward-leaning riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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