GAS GAS EC 300 - 2003 Specifications and Reviews

The 2003 GAS GAS EC 300 is a lightweight enduro motorcycle purpose-built for technical off-road terrain and competition use. Its 294cc two-stroke engine delivers sharp power characteristics ideal for skilled riders tackling challenging trail sections and cross-country events. Known for exceptional maneuverability and responsive handling, the EC 300 excels in rocky, mountainous terrain where precision control matters most.

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General information

CategoryEnduro / offroad
Year2003
ModelGAS GAS EC 300

Engine and Transmission Specifications

Exhaust systemExpansion chamber and FMF silencer
Greenhouse gases165.2 CO
Fuel consumption7.12 litres/100 km (14.0 km/l or 33.04 mpg)
ClutchMultidisc in oil bath, hydraulic actuation
Transmission type,final driveChain
Gearbox6-speed
Cooling systemLiquid
Lubrication systemPremix @ 50:1
IgnitionKokusan digital CDI Multispark
Fuel controlMembrane & power valve
Fuel systemCarburettor. Keihin PWK 38mm
Bore x stroke72.0 x 72.0 mm (2.8 x 2.8 inches)
Top speed136.8 km/h (85.0 mph)
Torque49.22 Nm (5.0 kgf-m or 36.3 ft.lbs) @ 6890
Power50.60
Engine typeSingle cylinder, two-stroke
Capacity:294.70 ccm (17.98 cubic inches)
 
 

Brakes, suspension, Frame and wheels

Rear brakes diameter220 mm (8.7 inches)
Rear brakesSingle disc. Nissin pump and Nisin single-piston caliper
Front brakes diameter260 mm (10.2 inches)
Front brakesSingle disc. Nissin pump and Nisin single-piston caliper
Rear tyre dimensions120/90-18
Front tyre dimensions80/100-21
Rear suspension travel320 mm (12.6 inches)
Rear suspensionProgressive monoshock system, multi adjustable, ÖHLINS
Front suspension travel282 mm (11.1 inches)
Front suspensionUpside-down telescopic, either 43mm WP or 45mm Marzocchi fork
Frame typeDeltabox type built using cromoly, rectangular tubes, aluminum swingarm

Physical measures and capacities

Fuel capacity9.50 litres (2.51 gallons)
Wheelbase1,475 mm (58.1 inches)
Ground clearance340 mm (13.4 inches)
Overall width810 mm (31.9 inches)
Overall length2,135 mm (84.1 inches)
Overall height1,260 mm (49.6 inches)
Seat height940 mm (37.0 inches) If adjustable, lowest setting.
Power/weight ratio0.4936 HP/kg
Dry weight102.5 kg (226.0 pounds)
 
 

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
Modifications compared to previous modelNEW MARZOCCHI FRONT FORK WITH TITANIUM TEATMENT TUBES. NEW AND STRONGERFRONT AND SPOKES AND NIPPLES. HIGHER HANDLEBAR. SWINGING ARM AXLE OF 17. REAR WHEEL HUB 300 GR. LIGHTER. NEW REAR BRAKE DISK. NEW REAR SHOCK SETTING. NEW GRAFFICKS. NEW REAR SIDE PANELS NEW SILENCER. NEW DIGITAL SPEEDO METER. HANDGUARDS HEBO. NEW FRAME GEOMETRY
Color optionsBlue
StarterKick

Performance Profile & Rider Fit

74 hp
Peak Power
4.5s
0-60 mph
85 mph
Top Speed

Best For

Track40%
City25%
Cornering55%
Daily Riding25%
Touring30%
Passenger10%

Rider Profile

Best ForBest suited to experienced off-road riders comfortable with a tall, lightweight, aggressive enduro machine.
PurposeBuilt primarily for serious trail riding, technical enduro, and off-road competition rather than road use.
Rider FitDemands a fit rider due to its tall 935mm seat height, minimal weight, and physical nature of off-road riding.
CharacterA punchy, high-revving big-bore single with sharp throttle response and race-derived suspension for tackling rough terrain.
Not Ideal ForNot a good fit for shorter riders, beginners, or anyone wanting a comfortable road-going or passenger-friendly machine.

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

Rider Fit Visualizer

2003 GAS GAS EC 300 Rider Ergonomics Assessment

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

Feet:

At 940mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2003 GAS GAS EC 300, with a cramped knee angle of around 85 degrees and an upright 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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