Target Audience:
Owners of Gas Gas EC 125, 200, 250, 300 models from 2003-2005 seeking to perform their own maintenance and repairs.
Value Proposition:
Significant cost savings on service, repair, and maintenance.
Manual Advantage:
Provides professional-level diagnostic and repair information in an accessible digital format.
Ease Of Use:
Very easy to use, no special technical know-how required.
Support:
Customer technical support via email available.
Delivery:
Instant delivery via email download link.
Usage Rights:
Unlimited use, no restrictions.
Engine Mechanical:
Full overhaul, top-end rebuild, bottom-end inspection, piston, rings, connecting rod, crankshaft, cylinder head, valves, camshafts (if applicable), timing (if applicable)
Engine Fuel System:
Carburetor adjustment, cleaning, and overhaul; fuel pump (if applicable); fuel lines; fuel tank maintenance
Engine Ignition System:
Spark plug diagnosis and replacement, ignition coil testing, CDI unit troubleshooting (if applicable)
Cooling System:
Radiator inspection and cleaning, coolant replacement, thermostat operation, fan system (if applicable)
Transmission:
Clutch inspection, adjustment, and replacement; gearbox disassembly and reassembly; gear inspection; lubrication
Chassis And Suspension:
Front fork overhaul, seal replacement, oil change; rear shock absorber inspection and adjustment; linkage bearings; swingarm service
Brakes:
Brake caliper overhaul, piston replacement; brake pad inspection and replacement; brake fluid flush and bleeding; master cylinder service; rotor inspection
Electrical System:
Wiring diagrams, lighting system troubleshooting, battery maintenance, starter motor testing (if applicable), headlight/taillight replacement
Bodywork And Frame:
Panel removal and installation, frame inspection, seat maintenance, handlebar replacement
Routine Maintenance:
Oil changes, filter replacements, chain adjustment, lubrication points, general inspection checks
Troubleshooting:
Diagnostic flowcharts, common problem identification, symptom-based repair guidance
Repair Procedures:
Step-by-step instructions for all major mechanical and electrical components, including detailed disassembly and reassembly sequences
Rebuild Procedures:
Comprehensive guidance for engine and transmission overhauls
Depth Of Coverage:
A-Z (All diagnostic and repair procedures covered comprehensively)
Diagnostic Capabilities:
Access to the same information as professional technicians and mechanics
Compatibility:
PC & MAC computers
Operating Systems:
Windows 95, 98, 98SE, 2000, NT, ME, XP, Vista, Windows 7, Windows 8
Printable Pages:
Yes (users can print fresh pages as needed)
Diagrams:
Highly detailed, printable diagrams
Binding:
Not Applicable (Digital Download)
Paper Type:
Not Applicable (Digital Download)
Bore X Stroke 125:
54mm x 54.5mm
Bore X Stroke 200:
64mm x 62.4mm
Bore X Stroke 250:
66.4mm x 72mm
Bore X Stroke 300:
72mm x 72mm
Horsepower Approx 125:
Approx. 35-40 HP (depending on tuning and specific model variant)
Horsepower Approx 250:
Approx. 45-50 HP (depending on tuning and specific model variant)
Horsepower Approx 300:
Approx. 50-55 HP (depending on tuning and specific model variant)
Carburetor Type Common:
Dell'Orto VHSH 30 (or similar quality carburetor)
Fuel Type:
Unleaded gasoline with appropriate 2-stroke oil pre-mix (e.g., 50:1 or as specified by Gas Gas)
Safety Features Overview:
Designed for off-road use; safety is primarily derived from rider skill and proper protective gear. Mechanical safety relies on robust components and correct assembly.
Braking System:
Hydraulic disc brakes front and rear (e.g., Brembo calipers common on these models).
Component Quality:
Emphasis on high-quality, durable components for reliable operation in demanding conditions.
Oil Change Interval:
Transmission oil: Consult manual, typically every 10-20 hours of riding or annually.
Spark Plug Replacement:
Consult manual, typically every 20-40 hours of riding or as needed based on condition.
Air Filter Cleaning:
Frequent cleaning/replacement recommended, often every ride or every few rides depending on conditions.
Coolant Type:
Ethylene glycol based antifreeze mixed with distilled water (50/50 ratio recommended).
Brake Fluid Type:
DOT 4 hydraulic brake fluid (typically).
Common Wear Items:
Clutch plates, piston rings, spark plugs, wheel bearings, steering head bearings, fork seals, swingarm bearings, chain and sprockets.
Carburetor Tuning:
Can be sensitive to altitude and temperature changes, requiring periodic adjustments.
Brand Focus:
Gas Gas is a Spanish manufacturer renowned for its high-performance off-road motorcycles, particularly in trials and enduro disciplines.
Ec Series Purpose:
The EC series represents Gas Gas's enduro line, designed for competitive off-road riding, trail riding, and general trail use.
Production Era:
Models from 2003-2005 represent a specific generation of Gas Gas enduro bikes, building on previous designs with refinements.
