Vehicle Segment:
Lightweight, urban-focused scooter
Target Demographic:
Commuters, students, riders seeking economical and maneuverable personal transport
Key Competitors Era:
Honda Tact, Suzuki Address, Aprilia SR50, Vespa ET2/LX50 (during various years of its production)
Design Philosophy:
Simplicity, reliability, ease of use, fuel efficiency
Distinguishing Features:
Compact size, automatic transmission, low running costs, Yamaha's reputable build quality for its class
Technical Accuracy:
Vehicle/model specific, not generic, mirroring dealership technician resources.
Geographic Coverage:
Global (applicable to models sold worldwide)
Model Year Coverage:
1987-2000
Scope Of Repair:
All repairs A-Z, model and vehicle specific
Estimated Page Count:
Comprehensive (exact count varies by edition, typically 300+ pages for such a broad range)
Type:
Service Repair Workshop Manual
Intended User:
Professional Technicians, Dealership Service Departments, Advanced DIY Mechanics
Format:
Digital (typically PDF), Printable
Engine Mechanical:
Complete overhaul, assembly, disassembly, component inspection, tuning
Fuel System:
Carburetor service and adjustment, fuel pump, fuel lines, fuel tank
Ignition System:
CDI unit, spark plug, ignition timing
Transmission Drive System:
Automatic CVT (Continuously Variable Transmission) service, belt inspection, variator and clutch assembly
Electrical System:
Wiring diagrams, lighting, starting system, charging system, battery, fuses
Brakes:
Front and rear brake systems, hydraulic lines, brake pads/shoes, caliper/drum service
Suspension:
Front forks, rear shock absorber, linkage maintenance
Steering:
Handlebar assembly, steering head bearing service
Cooling System:
Air cooling system inspection and cleaning
Chassis And Bodywork:
Frame, body panels, seat, storage compartment, stand
Routine Maintenance:
Oil changes, air filter cleaning/replacement, spark plug checks, tire pressure, brake adjustment
Troubleshooting:
Diagnostic charts, symptom-based problem solving
Repair Procedures:
Step-by-step instructions for component removal, installation, and repair
Tune Up:
Carburetor adjustment, ignition timing verification
Engine Rebuilding:
Piston, cylinder, crankshaft, bearing replacement and specifications
Electrical Diagnostics:
Wiring harness testing, component testing using multimeters
Depth:
Comprehensive (from basic checks to complete engine and transmission rebuilds)
Detail Level:
High (includes torque specifications, clearances, tolerances, and special tool requirements)
Digital Format:
PDF (Portable Document Format)
Searchability:
Searchable text for quick information retrieval
Printability:
High-quality, printable pages
Binding:
N/A (Digital Format) - If printed, typically spiral-bound for lay-flat use in a workshop environment.
Paper Quality:
N/A (Digital Format) - Original manuals would use durable, workshop-grade paper.
Engine Type:
2-stroke, air-cooled, single-cylinder
Displacement:
49cc (0.049 Liters)
Bore X Stroke:
39.0 mm x 41.4 mm
Compression Ratio:
Approx. 7.2:1
Carburetor Model:
Often a Mikuni VM10/11 or similar 10-12mm slide carburetor
Ignition System:
CDI (Capacitor Discharge Ignition)
Power Output Hp:
Approx. 5.0 - 5.5 HP (figures vary by specific market and year)
Torque Nm:
Approx. 4.5 - 5.0 Nm (figures vary by specific market and year)
Fuel Type:
Unleaded gasoline
Fuel Mixture:
Pre-mix or Oil Injection System (depending on specific variant)
Fuel Tank Capacity:
Approx. 3.5 - 4.0 Liters
Crash Test Ratings:
N/A (As a scooter, not subject to automotive crash test standards)
Brakes Front:
Drum brake (typically)
Brakes Rear:
Drum brake (typically)
Lighting:
Headlight, taillight, brake light, turn signals
Parking Brake:
Usually a lever-operated parking brake on the rear brake caliper/drum mechanism.
Infotainment System:
Basic dashboard instrumentation (speedometer, odometer, fuel gauge if equipped, indicator lights)
Driver Assistance Features:
N/A (Focus on basic transportation, not modern driver aids)
Oil Change Interval:
Every 2,000-3,000 km or annually (refer to manual for precise interval and oil type)
Air Filter Service:
Clean every 1,000 km, replace as needed (check condition)
Spark Plug Replacement:
Every 4,000-6,000 km or as recommended (e.g., NGK BR9HS or equivalent)
Transmission Belt Inspection:
Inspect every 4,000-6,000 km for wear and damage
Brake Pad Wear:
Check at every 2,000 km service
Engine Oil:
2-stroke engine oil meeting JASO FB or FD specifications. Typically mixed with fuel or via oil injection reservoir.
Final Drive Oil:
Yamaha Genuine Gear Oil (or equivalent SAE 80 hypoid gear oil) - Capacity approx. 100-150ml. Consult manual for exact type and capacity.
Coolant:
N/A (Air-cooled engine)
Common Wear Item:
CVT drive belt (prone to cracking or stretching over time)
Carburetor Issues:
Clogging due to stale fuel or debris, leading to poor idling or performance
Electrical Connections:
Corrosion on connectors, especially in humid environments, can cause intermittent electrical faults
Exhaust Port Fouling:
2-stroke engines can experience carbon buildup in the exhaust port, requiring periodic cleaning
Steering Head Bearings:
Wear and tear can lead to notchy steering or looseness
Manufacturer:
Yamaha Motor Company
Brand Focus:
Motorcycles, scooters, marine products, musical instruments
Introduction Year:
Introduced in 1987
Key Updates During Production:
Minor cosmetic changes, potential carburetor tuning for emissions compliance in later years. Core mechanicals remained largely consistent.
Production Period:
1987 - 2000
Manufacturing Locations:
Primarily Japan (factory specifications).
