Segment:
Premium Maxi-scooter
Target Audience:
Commuters, touring riders seeking comfort and performance.
Key Competitors Era:
Honda Foresight, Suzuki Burgman, Aprilia Leonardo.
Design Philosophy:
Comfort, stability, ample storage, and capable performance for urban and light touring use.
Engine Service:
Complete engine overhaul, diagnosis, tuning, and repair.
Transmission Service:
Automatic CVT (Continuously Variable Transmission) service, belt replacement, roller inspection, clutch service.
Electrical System:
Wiring diagrams, ignition system, charging system, lighting, starter system, fuses, relays, ECU diagnostics.
Fuel System:
Carburetor (likely Mikuni BSR series), fuel pump, fuel lines, fuel filter servicing and cleaning.
Cooling System:
Radiator, coolant, thermostat, water pump, hoses, fan diagnosis.
Braking System:
Front and rear brake caliper service, hydraulic lines, master cylinders, brake fluid flush, pad and disc replacement.
Suspension Steering:
Front fork service, rear shock absorber replacement, steering head bearing adjustment, linkage inspection.
Frame Bodywork:
Chassis inspection, fairing removal/installation, seat, storage compartment access, body panel repair and fitting.
Maintenance Tasks:
Scheduled maintenance, oil changes, filter replacements, spark plug checks, valve clearance adjustments, tire pressure checks.
Diagnostic Procedures:
Troubleshooting guides for common and uncommon issues, fault code interpretation (if applicable via diagnostic connector).
Repair Procedures:
Step-by-step instructions for component removal, installation, and repair.
Rebuild Procedures:
Detailed instructions for major component overhauls (e.g., engine rebuild).
Diagnostics:
Advanced diagnostics for engine, electrical, and mechanical systems.
Specifications:
Precise torque values, tolerances, fluid capacities, electrical specifications, engine timings.
Diagrams:
Highly detailed, printable diagrams and schematics for all major systems.
Engine Type:
Four-stroke, SOHC, liquid-cooled
Bore X Stroke:
70.0 mm x 64.2 mm
Compression Ratio:
10.2:1
Horsepower Est:
~20-23 HP @ 7,500 RPM (varies by market/tuning)
Torque Est:
~21-23 Nm @ 6,000 RPM (varies by market/tuning)
Carburetor Model Est:
Mikuni BSR29 (likely)
Fuel Delivery:
Carburetor with electric fuel pump
Ignition System:
Digital CDI
Oil Type:
Yamalube 4 (or equivalent API SG, JASO MA 10W-40)
Lighting:
Halogen headlight, LED taillight, turn signals.
Braking System:
Front: Dual disc brakes; Rear: Single disc brake (early models may have drum rear, but YP250 generally disc).
Parking Brake:
Yes (usually hand-operated lever engaging rear brake mechanism).
Dashboard Display:
Analog speedometer, tachometer, fuel gauge, odometer, trip meter, indicator lights.
Braking System:
Linked Braking System (LBS) may be present on some models, activating front and rear brakes with a single lever.
Charging Port:
12V accessory socket (cigarette lighter style) for charging devices.
Engine Oil Change:
Every 3,000-4,000 km or 6 months (refer to manual for exact). Check more frequently.
Air Filter Cleaning Replacement:
Clean every 5,000 km, replace as needed or every 10,000-15,000 km.
Spark Plug Replacement:
Inspect every 5,000 km, replace around 10,000-15,000 km (NGK CR8E or equivalent recommended).
Belt Drive Inspection:
Inspect CVT belt for wear and cracks every 10,000 km, replace typically between 15,000-25,000 km depending on usage.
Engine Oil Capacity:
Approximately 1.6 - 1.8 Liters (with filter change). Check dipstick.
Coolant Type:
High-quality ethylene glycol-based coolant (50% concentration with distilled water).
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid.
Common Wear Item:
CVT belt, variator rollers, voltage regulator, starter motor brushes.
Carburetor Maintenance:
Carburetor can become clogged with fuel varnish if left sitting; periodic cleaning and stabilization is recommended.