Segment:
Lightweight 50cc Scooter segment, popular for urban commuting and light recreational use.
Competitors:
Honda Dio, Suzuki Address, Aprilia SR50, Peugeot Speedfight (depending on market).
Vehicle Focus:
Compact size, agile handling, fuel efficiency, ease of operation, and Yamaha's reputation for reliability.
Benefit:
Cost-effective solution for maintaining optimal performance and longevity of the Yamaha CW50N.
Engine:
Complete disassembly, assembly, inspection, and repair of the 49cc 2-stroke engine.
Fuel System:
Carburetor inspection, cleaning, adjustment, and troubleshooting; fuel pump operation; fuel tank maintenance.
Ignition System:
CDI ignition system diagnostics, spark plug specifications, stator coil and pulse generator inspection.
Transmission:
Automatic CVT (Continuously Variable Transmission) inspection, belt replacement, clutch and torque converter servicing.
Cooling System:
Air cooling system components and maintenance.
Exhaust System:
Muffler and exhaust pipe inspection and replacement.
Chassis Frame:
Frame inspection, component mounting, and general chassis integrity checks.
Suspension Front:
Telescopic front fork inspection, maintenance, and seal replacement.
Suspension Rear:
Rear shock absorber inspection and replacement.
Brakes Front:
Drum brake adjustment, inspection, and component replacement.
Brakes Rear:
Drum brake adjustment, inspection, and component replacement.
Wheels Tires:
Wheel bearing inspection, tire pressure specifications, and tire replacement.
Electrical System:
Wiring diagrams, battery maintenance, lighting system (headlight, taillight, indicators), horn, and starter system.
Bodywork Cosmetics:
Panel removal and installation, seat, fairings, and storage compartment.
Maintenance:
Routine checks, lubrication, filter replacement, spark plug replacement, brake adjustment, fluid level checks.
Troubleshooting:
Diagnostic charts for common starting problems, poor performance, electrical issues, and braking concerns.
Repair:
Detailed step-by-step instructions for engine rebuilds, carburetor overhauls, transmission servicing, electrical component replacement, and suspension work.
Disassembly Assembly:
Comprehensive guides for complete vehicle disassembly and reassembly.
Torque Specifications:
Essential torque values for critical fasteners across all systems.
Wiring Diagrams:
Detailed electrical schematics for accurate fault finding and repair.
Depth:
Comprehensive: Covers everything from basic maintenance to full engine and transmission overhauls, including diagnostics and troubleshooting.
Engine Type:
2-stroke, single-cylinder, liquid-cooled (some variants may be air-cooled, manual will specify)
Bore X Stroke:
39.0 mm x 41.4 mm
Compression Ratio:
7.4 : 1 (approximate, refer to manual for exact)
Carburetor Model:
Likely a Mikuni VM12 or similar.
Horsepower:
Approximately 6.5 - 7.0 HP (subject to market regulations and tuning)
Torque:
Approximately 5.5 - 6.0 Nm
Fuel Type:
Unleaded gasoline (min 91 RON)
Fuel Mixture:
Automatic oil injection (premix is not standard)
Fuel Tank Capacity:
Approx. 5.0 Liters
Crash Test Ratings:
N/A (Scooters are generally not subjected to automotive-style crash testing).
Braking:
Front and rear drum brakes for reliable stopping power.
Lighting:
Headlight, taillight, brake light, and turn signals for visibility.
Frame Construction:
Steel frame providing structural integrity.
Ride Stability:
Designed for stable, predictable handling in urban environments.
Oil Change Engine:
Refer to manual; typically every 3,000-5,000 km for 4-stroke, but 2-strokes rely on oil injection system. Check oil reservoir regularly.
Spark Plug Replacement:
Every 5,000 - 10,000 km, depending on plug type and usage. Manual specifies correct type and gap.
Cvt Belt Inspection:
Every 5,000 km; replacement typically between 10,000 - 20,000 km depending on wear.
Air Filter Cleaning Replacement:
Clean every 5,000 km, replace as needed or every 10,000-15,000 km.
Brake Adjustment:
Check and adjust as needed, typically every 5,000 km.
Engine Oil Type:
2-stroke specific, high-quality oil injection type (e.g., Yamalube 2M or equivalent).
Coolant Type:
If liquid-cooled: Ethylene glycol-based antifreeze coolant. Manual specifies type and mixture ratio.
Gear Oil:
Refer to manual for transmission/final drive oil type and capacity (if applicable, some scooters do not have a separate gear oil for the CVT).
Common Problems:
Carburetor gumming due to stale fuel, CVT belt wear, weak starter motor, potential electrical connector corrosion.
Preventative Maintenance Tips:
Regular fuel stabilizer use if storing, checking oil levels frequently, cleaning air filter, ensuring proper electrical connections.
Manufacturer:
Yamaha Motor Corporation, a globally recognized leader in motorcycles, musical instruments, and other motorized products.
Lineage:
Part of the long-standing and popular Yamaha Jog scooter family, known for its sporty character and reliable performance.
Manufacturing Location:
Primarily manufactured in Japan and other Yamaha global facilities.
Key Production Years:
1999-2002 (for this specific CW50N variant).
