Category:
Lightweight Scooter
Target Audience:
Urban commuters, entry-level riders, hobbyists seeking reliable and maintainable personal transport.
Competitors:
Honda Dio, Suzuki Address, Kymco Agility 50, SYM Mio 50 (competing on price, reliability, fuel efficiency, and urban maneuverability).
Model Highlight:
Compact and fuel-efficient design, easy to operate, low maintenance requirements, suitable for city riding.
Performance Focus:
The 'High Performance' designation in the product name suggests the manual covers tuning and optimization possibilities within the constraints of the 50cc engine, potentially including carburetor jetting, variator tuning, and exhaust system considerations, as well as detailed factory specifications for optimal operation.
Powertrain:
Engine (disassembly, assembly, inspection, tuning), Carburetor, Ignition System, Fuel System, Exhaust System, Cooling System (air-cooled)
Transmission:
Automatic Transmission (CVT), Clutch, Drive Belt, Gearbox (final drive)
Chassis:
Frame, Suspension (front fork, rear shock), Steering System, Braking System (front disc, rear drum), Wheels and Tires
Electrical:
Wiring Diagram, Lighting System, Starting System, Charging System (stator, rectifier/regulator), Ignition Coil, CDI Unit, Switches, Instrumentation
Bodywork:
Fairings, Seat, Storage Compartment, Stands (center and side)
Routine Maintenance:
Oil change, air filter cleaning/replacement, spark plug inspection/replacement, drive belt inspection/replacement, brake adjustment, tire pressure check, general inspection
Major Repairs:
Engine overhaul (top-end and bottom-end), carburetor rebuilding, transmission service, suspension overhaul, brake system overhaul, electrical component testing and replacement
Troubleshooting:
Diagnostic charts for common problems, electrical system troubleshooting, engine performance issues
Depth Level:
Comprehensive. Covers disassembly, assembly, specifications, tolerances, diagnostic procedures, and repair techniques for all major systems. Suitable for professional technicians and advanced DIY mechanics.
Engine Type:
Four-stroke, single-cylinder, SOHC, forced air-cooled
Bore X Stroke:
39.0 mm x 41.4 mm
Compression Ratio:
10.6:1
Horsepower:
Approximately 3.0 - 4.0 HP (depending on regional tuning and emission regulations)
Torque:
Approximately 3.0 - 3.5 Nm
Fuel Delivery:
Carburetor (likely a Mikuni VM16SH or similar 16mm constant velocity carb)
Fuel Type:
Unleaded gasoline (minimum 87 octane recommended)
Fuel Tank Capacity:
4.0 Liters (approx.)
Ignition System:
CDI (Capacitor Discharge Ignition)
Spark Plug:
NGK CR7E or similar (gap 0.6-0.7mm)
Oil Type:
Yamalube 4 (or equivalent SAE 10W-40 API SE, SF, SG, SH, SJ or higher)
Oil Capacity:
0.8 Liters (without filter change), 0.9 Liters (with filter change)
Transmission Type:
Automatic Continuously Variable Transmission (CVT)
Optional Transmissions:
N/A (CVT is standard)
Drive Type:
Belt drive to rear wheel
Clutch Type:
Automatic centrifugal clutch
Gear Reduction:
Primary reduction: 2.000-2.100, Secondary reduction: 10.000 (approximate ratios)
Transmission Oil:
Yamalube Gear Oil (or equivalent SAE 80 API GL-4)
Transmission Oil Capacity:
0.1 Liters (approx.)
Safety Certification:
Meets applicable national and international safety standards for scooters of its class.
Braking System:
Front: Hydraulic Disc, Rear: Mechanical Drum
Tires:
Front: 80/90-10, Rear: 90/90-10 (tubeless)
Lighting:
Halogen headlamp, LED tail lamp, standard turn signals
Frame Construction:
Steel backbone frame
Handlebar:
Standard motorcycle-style handlebars for responsive steering
Instrument Cluster:
Analog speedometer, odometer, fuel gauge, indicator lights (turn signals, high beam, oil pressure/low oil).
Assistance Features:
N/A (Basic scooter functionality)
Engine Oil Change:
Every 3,000 km or 6 months, whichever comes first
Air Filter Cleaning:
Every 2,000 km or 6 months
Spark Plug Inspection:
Every 4,000 km
Drive Belt Inspection:
Every 10,000 km or 2 years
Brake System Check:
Every 5,000 km or annually
Engine Oil Viscosity:
SAE 10W-40
Coolant Type:
N/A (Air-cooled engine)
Brake Fluid Type:
DOT 3 or DOT 4
Common Problems:
CVT belt wear and slippage, carburetor gumming if not used regularly, starting issues due to weak battery or spark plug, potential intake manifold cracks (vacuum leaks).
Troubleshooting Tips:
Ensure fresh fuel, check for vacuum leaks, clean carburetor jets, verify spark plug condition, inspect and replace CVT components as needed. Electrical gremlins often related to grounding points.
Manufacturer:
Yamaha Motor Corporation, established 1955, known for a wide range of motorcycles, marine products, and musical instruments. Reputation for innovation, reliability, and performance.
Vst Generation:
This generation of the Vino 50 (SA24J chassis) represented a modernization of the original Vino concept, introducing updated styling and the 4-stroke engine for improved fuel efficiency and emissions compared to earlier 2-stroke models. It built on the success of its predecessors in urban mobility markets.
Production Period:
2001-2002 (specific to this manual's coverage)
Manufacturing Locations:
Primarily manufactured in Japan and/or Taiwan, depending on the specific market and assembly plant for Yamaha.
