Engine Mechanical:
Detailed coverage including disassembly, inspection, assembly, and specifications for top-end and bottom-end components.
Fuel System:
Carburetor specifications, adjustments, cleaning, fuel pump operation, fuel filter replacement, and fuel tank servicing.
Lubrication System:
Oil pump, oil filter, oil passages, and recommended lubrication schedules and specifications.
Cooling System:
N/A (Likely Air-Cooled)
Ignition System:
Spark plug specifications, ignition timing, CDI unit, and related electrical components.
Electrical System Charging:
Stator, rectifier/regulator, and battery charging system diagnosis and repair.
Electrical System Starting:
Starter motor, starter relay, and battery testing and troubleshooting.
Lighting System:
Headlight, taillight, brake light, turn signals, and indicator bulb specifications and wiring diagrams.
Braking System:
Front and rear brake caliper servicing, brake pad replacement, brake fluid specifications, bleeding procedures, and drum brake adjustment.
Suspension System:
Front fork servicing, fork oil specifications and levels, rear shock absorber inspection and replacement.
Wheel And Tire System:
Tire pressure recommendations, wheel bearing inspection, and spoke tensioning (if applicable).
Frame And Bodywork:
Frame inspection, fairing removal and installation, seat servicing, and general chassis components.
Basic Maintenance:
Oil changes, filter replacements, spark plug checks, chain adjustments, and brake lever adjustments.
Tune Up:
Comprehensive tune-up procedures including carburetor synchronization, valve clearance adjustment, and ignition timing verification.
Engine Rebuild:
Step-by-step instructions for complete engine disassembly, component inspection, parts replacement, and reassembly.
Carburetor Overhaul:
Detailed instructions for carburetor cleaning, jet replacement, float height adjustment, and idle speed settings.
Electrical Troubleshooting:
Diagnostic procedures for common electrical faults using wiring diagrams and component testing.
Brake System Repair:
Repair and replacement of brake calipers, master cylinders, and brake lines.
Suspension Fork Rebuild:
Instructions for front fork seal replacement, oil changes, and spring installation.
Depth:
Comprehensive, suitable for DIY enthusiasts and professional mechanics.
Diagnostics:
Includes diagnostic flowcharts and symptom-based troubleshooting guides.
Specifications:
Provides essential torque values, clearances, fluid capacities, and electrical resistance readings.
Diagrams:
Features high-quality, detailed diagrams and exploded views for component identification and assembly.
Engine Type:
Likely Single-Cylinder, 4-Stroke (typical for GF125 designation)
Displacement:
Approximately 124cc (based on '125' model designation)
Cooling Method:
Likely Air-Cooled (common for this class)
Horsepower:
Typically around 8-12 HP (estimate, specific data not provided)
Torque:
Specific data not provided, but expected to be suitable for its displacement.
Fuel Delivery:
Carburetor (standard for this era and displacement)
Fuel Type:
Unleaded Gasoline
Oil Type:
Specific SAE viscosity grade and API classification to be found in manual.
Oil Capacity:
Specific capacity to be found in manual.
Oil Change Interval:
Specific mileage or time intervals detailed in the manual, typically every 2,000-4,000 km or 6-12 months.
Air Filter Cleaning:
Intervals for cleaning or replacement are specified in the manual.
Spark Plug Replacement:
Recommended replacement intervals found in the manual.
Chain Lubrication Adjustment:
Regular checks and adjustments are crucial and detailed in the manual.
Engine Oil Viscosity:
Recommended viscosity grade (e.g., 10W-40) and API classification specified.
Brake Fluid Type:
DOT 3 or DOT 4 specified for hydraulic systems.
Fork Oil Type:
Specific weight and amount for front fork suspension detailed in the manual.
Common Problems:
Potential issues may include carburetor tuning complexities, electrical connector corrosion, and wear on suspension components, all of which the manual helps address.