Target Audience:
Owners, maintenance technicians, and repair shops working on Yamaha CW50M scooters.
Value Proposition:
Provides in-depth technical information for maintaining and repairing the CW50M, offering a cost-effective alternative to dealership servicing.
Completeness:
Covers all major mechanical and electrical systems for the specified model years.
Usability:
Organized with clear headings, diagrams, and step-by-step instructions for ease of use.
Engine Overhaul:
Complete rebuild procedures, torque specifications, component identification.
Fuel System:
Carburetor adjustment, fuel pump, fuel tank, fuel lines.
Cooling System:
Radiator, fan, coolant specifications, bleeding procedures.
Electrical System:
Wiring diagrams, ignition system, charging system, lighting, starter motor.
Transmission:
Automatic transmission (CVT), variator, clutch, gear reduction.
Suspension:
Front fork, rear shock absorber, bearings.
Brakes:
Front disc brake, rear drum brake, hydraulic system, adjustments.
Chassis And Body:
Frame, body panels, seat, storage compartment, fairings.
Routine Maintenance:
Oil changes, filter replacements, spark plug checks, brake adjustments.
Troubleshooting:
Diagnostic charts for common starting, running, and electrical issues.
Repair Procedures:
Step-by-step instructions for component removal, installation, and adjustment.
Overhaul Instructions:
Detailed guidance for engine and transmission rebuilds.
Depth:
Comprehensive (suitable for professional mechanics and advanced DIY users).
Diagnostic Capabilities:
Detailed troubleshooting flowcharts and symptom-based diagnostics.
Engine Type:
2-stroke, air-cooled
Bore X Stroke:
39.0 mm x 41.4 mm
Horsepower:
Approximately 4.5 - 5.0 PS (varies by market and tuning)
Torque:
Approximately 3.8 - 4.0 Nm (varies by market and tuning)
Carburetor Model:
Mikuni VM12
Fuel Type:
Unleaded gasoline
Fuel Mixture:
Pre-mix or automatic oil injection system (depending on specific variant).
Oil Type:
2-stroke engine oil (e.g., Yamalube 2-stroke oil)
Ignition System:
CDI (Capacitor Discharge Ignition)
Crash Safety:
N/A (Scooter classification, not subject to automotive crash testing standards)
Braking System:
Front disc brake with hydraulic actuation, rear drum brake with mechanical actuation.
Lighting:
Headlight, taillight, brake light, turn signals.
Frame Construction:
Steel tube frame for structural integrity.
Tires:
Tubeless tires for reduced risk of sudden deflation.
Engine Oil Change:
Every 1,000 km or 6 months, whichever comes first.
Air Filter Cleaning:
Every 1,000 km.
Spark Plug Check:
Every 2,000 km, replace as needed.
Transmission Oil Change:
Every 5,000 km or 12 months, whichever comes first.
Brake Fluid Check:
Every 6,000 km or 12 months.
Engine Oil Capacity:
Approximately 0.7 Liters (for 2-stroke oil injection).
Gear Oil Capacity:
Approximately 0.08 Liters.
Coolant Type:
Yamaha Coolant (50% ethylene glycol and 50% deionized water).
Carburetor Clogging:
Common with age and infrequent use, requiring cleaning and adjustment.
Variator Wear:
Can lead to sluggish acceleration and reduced top speed; requires inspection and potential replacement.
Electrical Connector Corrosion:
Can cause intermittent electrical issues, especially in humid environments.
Air Filter Deterioration:
Requires regular inspection and replacement to maintain engine performance.
Spark Plug Recommendation:
NGK BR8HS or equivalent.
Yamaha Legacy:
Yamaha Motor Corporation is a global leader in motorcycles, scooters, and other powered products, known for innovation and performance.
Jog Series:
The CW50M is part of the long-running and popular Yamaha Jog series of scooters, known for their reliability and sporty handling.
Manufacturing Location:
Primarily manufactured in Japan.
Market Segment:
Lightweight scooter, popular for urban commuting and light recreation.
Model Reputation:
The Yamaha Jog series is widely recognized for its reliability, ease of use, and cost-effectiveness in the lightweight scooter market.
User Satisfaction:
Consistently high user satisfaction due to its dependable performance for daily commuting.
Emissions Standards:
Compliant with prevailing emissions standards for its production era.
