Engine Mechanics:
Engine disassembly, assembly, component inspection, torque specifications, timing, cooling system.
Fuel System:
Carburetor (Dell'Orto PHVA 12 or similar), fuel pump, fuel tank, fuel lines, fuel filter.
Ignition System:
Ignition coil, CDI unit, spark plug, wiring diagrams.
Exhaust System:
Exhaust pipe, muffler, gaskets, emissions controls (if applicable).
Transmission Clutch:
Clutch operation, adjustment, fluid, gearbox components, gear selection mechanism.
Cooling System:
Radiator, coolant, hoses, water pump, thermostat, bleeding procedure.
Electrical System:
Battery, charging system (stator, regulator/rectifier), lighting (headlight, taillight, turn signals), starter motor, wiring harness, fuses, switches.
Brakes:
Hydraulic front brake system (master cylinder, caliper, brake line, rotor), rear brake system (drum or disc depending on variant), brake fluid, bleeding procedures, pad replacement.
Suspension:
Front telescopic forks (Öhlins or Marzocchi common), rear monoshock absorber, linkage, adjustments, oil changes.
Steering:
Handlebars, steering head bearings, steering lock, adjustments.
Wheels Tires:
Wheel bearing replacement, tire pressure, tire size specifications, rim maintenance.
Chassis Frame:
Frame inspection, swingarm, subframe, engine mounts.
Bodywork:
Fairing removal and installation, seat, fuel tank cover, tail section, graphics.
Routine Maintenance:
Oil changes, filter replacements, chain adjustment, spark plug checks, tire pressure checks, brake fluid level checks, coolant checks.
Troubleshooting:
Diagnostic charts for common problems related to starting, running, electrical issues, etc.
Engine Repair:
Full engine rebuild, piston ring replacement, cylinder inspection, valve adjustments (if applicable to 2-stroke).
Transmission Overhaul:
Gearbox disassembly, reassembly, clutch servicing.
Electrical Diagnostics:
Wiring schematic interpretation, testing of electrical components, fault finding.
Suspension Servicing:
Front fork oil change and seal replacement, rear shock absorber inspection.
Brake System Maintenance:
Brake pad replacement, caliper servicing, brake line replacement, bleeding.
Carburetor Tuning:
Adjustment of idle speed, mixture, jetting recommendations.
Depth:
Detailed, suitable for experienced mechanics and skilled DIY enthusiasts.
Diagnostic Level:
Advanced diagnostics with wiring diagrams and component testing procedures.
Rebuild Scope:
Full mechanical and electrical system rebuilds.
Type:
Two-stroke, liquid-cooled, single-cylinder
Bore X Stroke:
Approximately 39.5 mm x 40.3 mm
Compression Ratio:
Typically around 8.5:1 to 9.5:1 (varies by specific engine variant and tuning).
Horsepower:
Approximately 6-7 hp (stock, restricted for legal reasons in many markets; de-restricted potential is higher).
Torque:
Approximately 4-5 Nm (stock).
Carburetor Model:
Dell'Orto PHVA 12 VS (common, may vary slightly).
Fuel Type:
Unleaded gasoline with 2-stroke oil premix or separate oil injection system.
System:
Premix or Autolube (oil injection).
Engine Oil Change:
Check level frequently, change 2-stroke oil if autolube system is used (or top up premix) as per manual; gearbox oil every 6,000-10,000 km.
Spark Plug Inspection:
Every 3,000-5,000 km (depending on usage and plug type).
Air Filter Cleaning:
Every 3,000-5,000 km, replace as needed.
Chain Lubrication Adjustment:
Every 500-1,000 km, or after riding in wet conditions.
Engine Oil Type:
High-quality 2-stroke synthetic or semi-synthetic oil (specific API/JASO rating recommended).
Gearbox Oil Type:
API GL-4 or GL-5 SAE 75W/80 or 75W/90 gear oil (check manual for precise specification).
Coolant Type:
Ethylene glycol-based antifreeze with corrosion inhibitors (typically 50/50 mix with distilled water).
Brake Fluid Type:
DOT 4 hydraulic brake fluid.
Carburetor Clogging:
Common in older carbureted vehicles due to stale fuel; requires cleaning and proper jetting.
Exhaust Blockage:
2-stroke exhaust ports and mufflers can carbon up over time, reducing performance.
Electrical Connection Corrosion:
Can occur on older models, particularly in areas exposed to moisture.
Suspension Leaks:
Fork seals can degrade over time, leading to oil leaks.