Engine Mechanical:
Complete disassembly and reassembly of the 125cc Rotax engine, including cylinder, piston, crankshaft, connecting rod, bearings, seals, and gaskets.
Fuel System:
Carburetor adjustment and overhaul (likely Dell'Orto or similar), fuel lines, fuel pump, fuel filter.
Ignition System:
CDI ignition system, spark plug specifications, ignition timing, troubleshooting ignition faults.
Cooling System:
Radiator, coolant flow, water pump, thermostat, fan operation, coolant specifications, bleeding procedures.
Transmission Drivetrain:
Automatic transmission (likely CVT - Continuously Variable Transmission), clutch operation, variator, torque converter, drive belt inspection and replacement, final drive.
Electrical System:
Wiring diagrams, battery specifications, charging system (alternator/stator), starter motor, lighting, horn, switches, fuses, troubleshooting electrical circuits.
Chassis Frame:
Frame inspection, welding points, steering head bearings, center stand, side stand.
Suspension Front:
Front fork overhaul, oil specifications, seal replacement, spring rates, damping adjustments.
Suspension Rear:
Rear shock absorber specifications, adjustment, linkage lubrication, swingarm bearings.
Brakes Front:
Front brake caliper service, brake pad replacement, master cylinder overhaul, brake fluid specifications (DOT 4), bleeding procedures, rotor specifications.
Brakes Rear:
Rear brake caliper service, brake pad replacement, master cylinder overhaul, brake fluid specifications (DOT 4), bleeding procedures, rotor specifications.
Wheels Tires:
Wheel bearing inspection and replacement, tire pressure specifications, recommended tire sizes.
Bodywork Fairings:
Panel removal and installation, fairing repair, seat removal, storage compartment access.
Routine Maintenance:
Oil change intervals and specifications, air filter cleaning/replacement, spark plug replacement, chain/belt adjustment, brake adjustments.
Engine Rebuild:
Detailed step-by-step instructions for full engine disassembly, inspection, component replacement (piston, rings, bearings, seals), and reassembly with torque specifications.
Carburetor Overhaul:
Complete carburetor disassembly, cleaning, reassembly, jetting adjustments, and idle speed settings.
Brake System Service:
Bleeding the brake system, replacing brake pads and rotors, servicing brake calipers and master cylinders.
Suspension Fork Rebuild:
Front fork oil change, seal replacement, and general overhaul procedures.
Electrical Troubleshooting:
Diagnosis of common electrical issues using wiring diagrams and multimeter testing.
Troubleshooting Guides:
Diagnostic flowcharts and symptom-based troubleshooting for various mechanical and electrical problems.
Depth Level:
Comprehensive, covering everything from basic maintenance to full engine and transmission rebuilds, including advanced diagnostics.
Engine Type:
2-stroke, liquid-cooled, single-cylinder, Rotax
Displacement:
124.8 cc (125cc class)
Bore X Stroke:
Approximately 54 mm x 54.5 mm (typical for this engine) - specific data may vary, check manual.
Compression Ratio:
Likely around 7.0:1 to 8.0:1 (for 2-stroke) - specific data in manual.
Horsepower Output:
Approx. 14-15 HP at 7,500-8,500 RPM (estimated, performance tuning can vary)
Torque Output:
Approx. 1.3-1.4 kgf-m at 7,000-7,500 RPM (estimated)
Carburetor Model:
Likely Dell'Orto PHVB 26 or similar
Fuel Delivery:
Carburetor
Fuel Type:
Unleaded gasoline (RON 95 or higher recommended)
Oil Mixing:
Automatic oil injection system
Engine Oil Type:
2-stroke specific engine oil (e.g., Motul 510, Castrol Power 1 TTS) - specific viscosity (e.g., SAE 7.5W-30) and API rating (e.g., API TC, JASO FD) in manual.
Transmission Oil Type:
Gear oil (e.g., SAE 80W-90) - specific capacity and API GL-4 rating in manual.
Length:
Approx. 1900-2000 mm (estimate, specific dimensions in manual)
Width:
Approx. 700-750 mm (estimate, specific dimensions in manual)
Height:
Approx. 1200-1250 mm (estimate, specific dimensions in manual)
Wheelbase:
Approx. 1350-1380 mm (estimate, specific dimensions in manual)
Dry Weight:
Approx. 120-130 kg (estimate, specific weight in manual)
Fuel Tank Capacity:
Approx. 8-10 liters (estimate, specific capacity in manual)
Engine Oil Change:
Every 3,000-4,000 km or annually. Specific interval in manual.
Air Filter Cleaning:
Every 2,000-3,000 km or as needed based on operating conditions. Replacement recommended every 6,000-8,000 km.
Spark Plug Replacement:
Every 5,000-6,000 km. Specific plug type (e.g., NGK CR7E or similar) in manual.
Drive Belt Inspection:
Inspect every 5,000 km, replace as needed (typically around 10,000-15,000 km depending on usage).
Brake Fluid Flush:
Every 2 years or as per manual recommendation. Use DOT 4 brake fluid.
Coolant Type:
Ethylene glycol-based coolant with anti-corrosion additives. Mixing ratio 50/50 with distilled water recommended. Specific brand/type in manual.
Common Problems:
Wear on CVT components (variator rollers, clutch shoes), carburetor tuning issues, potential for 2-stroke engine wear if not maintained properly, electrical connections can corrode.
