🏷️ Basic Information

Make:

Gas Gas

Model:

EC/MC/SM 125, 200, 250, 300

Year:

2005

Product Code:

2005 GAS GAS EC/MC/SM 125 200 250 300 Part List Manual Download

👋 Introduction

Market Segment:

Off-road (Enduro) and Supermoto motorcycles

Competitors:

KTM EXC, Husqvarna WR, Beta RR, Yamaha YZ/WR, Suzuki RM/RMX, Honda CR/CRF, Kawasaki KX/KDX

Vehicle Type:

2-stroke off-road and supermoto motorcycles

Engine Configuration:

Single-cylinder, liquid-cooled, 2-stroke

Purpose:

Designed for competitive off-road riding (enduro, cross-country) and street-legal supermoto applications.

Manual Utility:

Essential for identifying and sourcing correct replacement parts for maintenance and restoration.

📋 Manual Details

Covered Models:

Gas Gas EC 125, EC 200, EC 250, EC 300, MC 125, MC 200, MC 250, MC 300, SM 125, SM 200, SM 250, SM 300

Estimated Page Count:

Variable (typical for a comprehensive parts list manual, often 150-300 pages depending on detail)

Manual Type:

Part List Manual (Illustrated Parts Catalog)

Language:

English

File Format:

PDF

📖 Manual Coverage

Engine Components:

Cylinder, piston, crankshaft, connecting rod, cylinder head, valves, carburetor components, exhaust system components

Chassis Components:

Frame, subframe, swingarm, linkage, footpegs, seat

Suspension:

Front forks (internal and external components), rear shock absorber, linkage bearings

Brakes:

Front and rear brake calipers, master cylinders, brake lines, brake pads, rotors

Cooling System:

Radiator, hoses, water pump components (if applicable)

Fuel System:

Fuel tank, fuel cap, petcock, fuel lines, carburetor jets and components

Ignition System:

Spark plug, ignition coil, CDI unit (component identification)

Exhaust System:

Expansion chamber, muffler, header pipe, mounting hardware

Wheels And Tires:

Rims, spokes, hubs, bearings, tire sizes (identification)

Electrical System:

Wiring harness components, switches, lights (component identification)

Controls:

Handlebars, levers, cables (throttle, clutch), shifter, brake pedal

Part Identification:

Detailed illustrations with corresponding part numbers for every component.

Assembly Disassembly Guides:

Implied through exploded views and part sequencing.

Component Lookup:

Enables accurate ordering of replacement parts.

Technical Depth:

Component-level identification and part numbering; does not typically include diagnostic procedures or repair steps.

📊 Manual Specifications

File Format:

PDF

Print Quality:

High Quality, Printable pages

Binding Type:

Digital (PDF)

Paper Type:

N/A (Digital)

Operating Systems:

All Versions of Windows & Mac

Software Requirements:

Adobe PDF Reader

Delivery Method:

Instant Download

Shipping Cost:

None

⚙️ Engine Specifications

Type:

Liquid-cooled, 2-stroke

Cylinder Arrangement:

Single cylinder

Bore X Stroke 125:

54mm x 54.5mm (typical for 125cc 2-stroke)

Bore X Stroke 200:

62.5mm x 65mm (typical for 200cc 2-stroke)

Bore X Stroke 250:

66.4mm x 72mm (typical for 250cc 2-stroke)

Bore X Stroke 300:

72mm x 73mm (typical for 300cc 2-stroke)

Displacement 125:

124.8 cc

Displacement 200:

200.9 cc

Displacement 250:

249.3 cc

Displacement 300:

294.1 cc

Horsepower Approx 250:

~45-50 hp (estimated for 250cc model)

Torque Approx 250:

~35-40 Nm (estimated for 250cc model)

Carburetor Type:

Keihin PWK (typically 36mm or 38mm, specific to engine size)

Fuel Type:

Unleaded gasoline with 2-stroke oil pre-mix (specific ratio in owner's manual)

Type:

Pre-mix or Autolube system (depending on specific variant, manual will clarify)

Ignition System:

Digital CDI

🔧 Transmission

Type:

6-speed constant mesh sequential

Type:

N/A

Clutch:

Hydraulically operated, wet multi-plate

Final Drive:

Chain drive

📐 Dimensions

Wheelbase:

Variable by model (typically around 1470mm for 250/300 models)

Seat Height:

Variable by model (typically around 950mm for off-road models)

Dry Weight:

Variable by model (typically around 100-110 kg for 250/300 models)

🛡️ Safety Features

Crash Test Ratings:

Not applicable for off-road motorcycles

Braking System:

Hydraulic disc brakes, front and rear

Suspension System:

Upside-down telescopic front forks, Monoshock rear suspension (brand/model specific, e.g., Marzocchi, Sachs, Ohlins)

Frame Construction:

Chromium-molybdenum steel, perimeter frame

💡 Technology Features

Infotainment System:

N/A (Pure off-road/supermoto focus, no digital infotainment)

Driver Assistance Features:

N/A

Connectivity Features:

N/A

🔧 Maintenance

Spark Plug Replacement:

Typically every 20-30 hours of use (refer to owner's manual for precise interval and type)

Air Filter Cleaning:

Frequent cleaning, often after every ride or every few hours, depending on conditions.

Piston Ring Replacement:

Every 50-100 hours of use (variable based on riding style and conditions).

Top End Rebuild:

Every 100-150 hours of use (piston, rings, gaskets).

Clutch Maintenance:

Regular inspection of plates and springs, fluid changes.

Engine Oil Type:

High-quality 2-stroke engine oil, specific brand/viscosity recommended by Gas Gas (e.g., Motul, Castrol)

Transmission Oil Type:

Specific gearbox oil, e.g., SAE 10W/30 or 10W/40, API GL-4 or GL-5 (refer to manual)

Coolant Type:

Ethylene glycol-based antifreeze/coolant mixture (50/50 with distilled water recommended)

Brake Fluid Type:

DOT 4 brake fluid

Carburetor Jetting:

Can be sensitive to altitude and temperature changes; requires proper jetting for optimal performance.

Clutch Slave Cylinder:

Occasional leaks or failure of the hydraulic clutch slave cylinder seal (common on many hydraulic clutch systems).

Power Valve Operation:

Carbon buildup can affect power valve operation; requires periodic cleaning and lubrication.

Suspension Seals:

Like many off-road bikes of this era, fork and shock seals can be prone to wear, especially with aggressive use.

📚 Vehicle History

Brand Origin:

Spain

Gas Gas Offroad Legacy:

Gas Gas has a long history of producing competitive off-road motorcycles, particularly in enduro and trials disciplines.

Manufacturing Location:

Ripoll, Catalonia, Spain

🏆 Awards & Recognition

Motorcycle Awards:

Gas Gas models have historically been recognized for their performance and handling in off-road racing disciplines, though specific awards for the 2005 model line are not widely publicized.