Market Segment:
Compact, lightweight 50cc scooter, popular for urban commuting and recreational use.
Key Competitors:
Honda Dio, Suzuki Address, Aprilia SR50, Kymco Like (contemporary models)
Vehicle Appeal:
Reliability, fuel efficiency, ease of operation, compact size for maneuverability.
Manual Value Proposition:
Essential for owners and mechanics to perform maintenance, repairs, and diagnostics to keep the CW50M running optimally.
Engine:
Complete engine overhaul, top end (cylinder, piston, rings), bottom end (crankshaft, bearings), cooling system (air cooling details), lubrication system (oil injection)
Fuel System:
Carburetor disassembly, cleaning, adjustment, fuel tank, fuel lines, fuel filter
Ignition System:
CDI unit, spark plug, ignition coil, wiring diagrams, timing checks
Transmission:
Automatic transmission (CVT - Continuously Variable Transmission), clutch, variator, torque driver, belt replacement, gear ratios (final drive)
Electrical System:
Starter motor, generator (stator/rotor), battery, lighting (headlight, taillight, indicators), horn, wiring harnesses, electrical component testing
Brakes:
Front and rear brake systems (likely drum brake or early disc brake for front), brake lever, brake cable, brake fluid (if applicable), brake pad/shoe replacement, adjustment
Suspension:
Front forks (telescopic), rear shock absorber, suspension tuning, replacement
Chassis And Body:
Frame, body panels, seat, storage compartment, steering system (handlebar, steering stem), wheel replacement, tire mounting and balancing
Exhaust System:
Exhaust pipe, muffler, inspection, cleaning
Maintenance:
Regular servicing, oil changes (gear oil), filter cleaning/replacement, spark plug checks, brake adjustments, chain lubrication (if applicable, though unlikely for this model), general inspection
Troubleshooting:
Diagnostic procedures for common starting issues, performance problems, electrical faults, component failures
Repair:
Step-by-step instructions for component removal, installation, and repair
Disassembly Assembly:
Detailed instructions for complete disassembly and reassembly of major vehicle components
Specifications Settings:
Torque specifications, clearances, valve adjustments (if applicable), carburetor settings
Depth Of Coverage:
Comprehensive: Covers all aspects of repair, maintenance, and troubleshooting for the specified model years.
Diagnostic Capabilities:
Advanced diagnostics, including electrical system troubleshooting and component testing.
Rebuild Instructions:
Detailed instructions for complete engine and transmission rebuilds.
Diagrams Illustrations:
Includes detailed exploded views, wiring diagrams, and step-by-step illustrations.
Engine Code:
A131E (common)
Engine Displacement:
49 cc
Bore X Stroke:
39.0 mm x 41.4 mm (approximate)
Compression Ratio:
7.2:1 (approximate)
Cooling System:
Forced Air Cooling
Carburetor Model:
Mikuni VM10/16 (or similar, e.g., BS22)
Horsepower:
Approx. 5.0-5.5 HP at 6,750 RPM
Torque:
Approx. 0.5-0.6 kgf-m at 6,000 RPM
Fuel Delivery:
Carburetor
Fuel Type:
Unleaded gasoline (minimum 87 octane)
Oil Injection:
Separate 2-stroke oil injection system
Fuel Tank Capacity:
Approx. 5.0 Liters
Safety Ratings:
N/A (Motorcycle/scooter safety is typically assessed via roadworthiness and component performance, not formal crash test ratings like cars).
Braking System:
Combined braking system (may apply to some models for regulatory compliance, check manual for specifics).
Lighting:
Headlight, taillight, brake light, turn signals for visibility.
Chassis Construction:
Steel frame designed for stability and rider support.
Tires:
Tubeless tires for reduced risk of sudden deflation.
Oil Change Frequency:
Gear oil: Every 3,000 - 5,000 km or annually. (Consult manual for exact mileage).
Spark Plug Replacement:
Inspect every 1,000 km, replace as needed (approx. 5,000-10,000 km).
Air Filter Cleaning:
Clean every 1,000 - 2,000 km, replace as needed.
Brake Pad Replacement:
Inspect every 1,000 km, replace when worn to minimum thickness.
Cvt Belt Inspection:
Inspect every 5,000 km, replace as needed (typically 10,000-20,000 km depending on usage).
Gear Oil Type:
Yamalube Gear Oil (or equivalent SAE 80 API GL-4)
Gear Oil Capacity:
Approx. 0.08 Liters (80 ml)
Two Stroke Oil:
Yamaha Yamalube 2 Stroke Oil (or equivalent JASO FD / API TC certified oil)
Common Problems:
Carburetor clogging due to infrequent use or poor fuel quality, CVT belt wear, electrical connections corrosion, weak starter motor.
Recommended Preventative Maintenance:
Regularly run the engine if stored, use fresh fuel, keep the air filter clean, and perform scheduled maintenance.
Brand Origin:
Yamaha Motor Company, Ltd. is a Japanese manufacturer of motorcycles, marine products, and other motorized products. Founded in 1955.
Cw50 Lineage:
The CW50 'Jog' series is one of Yamaha's long-standing and highly popular scooter lines, known for its compact size and sporty performance for its class.
Production Location:
Primarily Japan, with potential assembly in other regions for specific markets.
Production Period:
The Jog series has been in continuous production for many years, with the CW50M representing a specific iteration from the late 90s to early 2000s.
