Engine Service:
Diagnosis, disassembly, inspection, repair, reassembly of engine components (cylinder, piston, crankshaft, conrod, lubrication, cooling).
Fuel System:
Carburetor system, fuel tank, fuel lines, fuel pump (if applicable).
Ignition System:
CDI unit, spark plug, ignition coil, wiring.
Exhaust System:
Muffler, exhaust pipe, catalytic converter (if applicable).
Transmission System:
Automatic transmission (CVT - Continuously Variable Transmission), clutch, variator, torque converter, drive belt, final drive.
Brakes System:
Front and rear brake systems (likely disc brakes), hydraulic lines, calipers, brake pads, master cylinders, brake fluid specifications.
Suspension System:
Front fork (telescopic), rear shock absorber, swingarm, suspension adjustments.
Steering System:
Handlebars, steering column, bearings, linkage.
Electrical System:
Battery, starter motor, alternator/generator, lighting system (headlight, taillight, indicators), horn, wiring diagrams, fuses, relays.
Bodywork And Trim:
Body panels, fairings, seat, storage compartments, dashboard, mirrors.
Cooling System:
Liquid cooling system (if applicable, though FX125 might be air-cooled), radiator, coolant, water pump.
Wheels And Tires:
Wheel specifications, tire sizes, tire pressure recommendations, wheel bearing maintenance.
Routine Maintenance:
Oil changes, filter replacements, spark plug checks, brake adjustments, drive belt inspection/replacement.
Troubleshooting:
Diagnostic procedures for common problems, fault codes (if applicable), symptom-based troubleshooting.
Repair Procedures:
Step-by-step instructions for all major repair tasks, including engine rebuilds, transmission overhauls, brake system repairs, electrical diagnostics.
Explodede Views:
Detailed exploded views and diagrams for component identification and assembly order.
Torque Specifications:
Precise torque values for all critical fasteners.
Wiring Diagrams:
Complete and detailed electrical wiring diagrams for easy diagnosis and repair.
Depth Of Information:
Professional quality, highly detailed; suitable for professional mechanics and experienced DIY enthusiasts.
Engine Type:
2-stroke, single-cylinder, liquid-cooled (likely, though some earlier/basic models might be air-cooled; FX typically refers to liquid-cooled).
Displacement:
125cc (approximately)
Bore X Stroke:
Likely 57mm x 49mm or similar for Piaggio 125cc 2-stroke engines.
Compression Ratio:
Typically around 10.5:1 to 12.0:1 for this era of 125cc 2-stroke performance scooters.
Fuel System:
Carburetor (e.g., Dell'Orto PHBN 16/17.5mm or similar).
Ignition Type:
Electronic ignition (CDI).
Lubrication:
Pre-mix or oil injection system (common for 2-stroke scooters).
Horsepower:
Approximately 11-15 HP (depending on specific tuning and regulations).
Torque:
Approximately 9-11 Nm.
Engine Oil Change:
Every 3,000 - 5,000 km or annually, check manual for specifics.
Gearbox Oil Change:
Every 6,000 - 10,000 km or annually, check manual for specifics.
Drive Belt Inspection Replacement:
Inspect every 5,000 km, replace every 10,000 - 15,000 km or as needed based on wear.
Spark Plug Replacement:
Check every 3,000 km, replace every 6,000 - 10,000 km or as needed.
Engine Oil Type:
2-stroke specific synthetic or semi-synthetic oil, pre-mix or injection type as per vehicle's system. API TC, JASO FD rated.
Gearbox Oil Type:
API GL-4 SAE 75W/90 or SAE 80W/90 gear oil.
Coolant Type:
Ethylene glycol-based coolant (if liquid-cooled). Check manual for specific mixture ratio (typically 50/50).
Brake Fluid Type:
DOT 4 or DOT 5.1 brake fluid.
Common Wear Items:
Drive belt wear, variator rollers, exhaust Gasket, starter motor brushes, water pump seal (if liquid cooled).
Electrical Gremlins:
Corrosion on connectors, failing rectifier/regulator, CDI unit issues can occur on older models.
Carburetor Issues:
Clogging due to stale fuel, adjustment issues leading to poor running.
