Segment:
Lightweight Scooter / Moped
Target Audience:
Commuters, urban riders, recreational users
Key Competitors 2007:
Honda Ruckus, Honda Metropolitan, Kymco Agility 50, Genuine Buddy 50
Design Philosophy:
Rugged, utilitarian, with an 'off-road' inspired aesthetic for a scooter
Distinctive Styling:
Dual headlights, exposed frame elements, chunky tires
Engine Overhaul:
Complete engine disassembly, inspection, repair, and reassembly
Fuel System:
Carburetor tuning, fuel pump, fuel lines, fuel tank maintenance
Cooling System:
Radiator, coolant, hoses, thermostat inspection and replacement
Ignition System:
Spark plug, ignition coil, CDI unit, wiring diagnostics
Transmission And Drivetrain:
CVT (Continuously Variable Transmission) inspection, belt replacement, clutch and variator service
Brakes:
Front and rear brake system service, hydraulic lines, pads, rotors, caliper maintenance
Suspension:
Front forks, rear shock absorber inspection and service
Steering:
Handlebar assembly, steering stem bearings, linkage maintenance
Electrical System:
Wiring diagrams, battery maintenance, lighting, starter system, charging system (stator, regulator/rectifier)
Frame And Bodywork:
Chassis inspection, body panel removal and installation, seat, fairings
Routine Maintenance:
Oil changes, filter replacements, air filter service, spark plug checks, chain lubrication (if applicable for drive system)
Troubleshooting Guides:
Diagnostic charts for common problems and symptoms
Rebuild Procedures:
Detailed step-by-step instructions for major component rebuilds
Component Diagnosis:
Methods for diagnosing electrical and mechanical faults
Torque Specifications:
Critical torque values for all fasteners
Depth Level:
Comprehensive: from basic owner maintenance to full engine and transmission rebuilds
Diagnostic Capabilities:
Detailed diagnostic procedures, including electrical circuit testing
Component Illustrations:
Exploded views and diagrams for all major assemblies
Engine Type:
4-stroke, 1-cylinder, SOHC
Bore X Stroke:
39.0 mm x 41.4 mm
Cooling System:
Forced air cooling
Horsepower Est:
Approx. 3.8 HP @ 7500 RPM
Torque Est:
Approx. 2.7 ft-lbs @ 7000 RPM
Carburetor Model:
Mikuni VM17 (typically)
Fuel Requirement:
Unleaded gasoline, minimum 87 octane
Fuel Tank Capacity:
1.2 Gallons (4.7 Liters)
Transmission Type:
Automatic CVT (Continuously Variable Transmission)
Drive Type:
V-belt drive, Chain final drive
Variator Operation:
Variable pulley system for seamless gear ratio changes
Clutch Type:
Centrifugal clutch
Transmission Oil Type:
Yamalube Gear Oil 80W or equivalent API GL-4
Transmission Oil Capacity:
Approx. 0.12 Liters (120 ml)
Overall Length:
Approx. 72.8 inches (1850 mm)
Overall Width:
Approx. 28.5 inches (725 mm)
Overall Height:
Approx. 44.1 inches (1120 mm)
Wheelbase:
Approx. 50.2 inches (1275 mm)
Dry Weight:
Approx. 216 lbs (98 kg)
Curb Weight:
Approx. 227 lbs (103 kg)
Underseat Storage:
Significant storage compartment suitable for a full-face helmet
Crash Test Information:
As a small displacement scooter, not typically subject to the same rigorous crash testing as automobiles. Emphasis on rider protection through vehicle design and manual guidance.
Lighting:
Dual 35W headlights, 5W/21W taillight/brake light, 3W front and rear turn signals
Braking System:
Front disc brake, rear drum brake for responsive stopping power
Frame Construction:
Steel tube frame for rigidity and rider protection
Tires:
All-terrain style, knobby tires for improved grip in various conditions
Display Features:
Analog speedometer, fuel gauge, odometer, indicator lights (turn signal, high beam, oil)
ABS:
Not equipped with Anti-lock Braking System (ABS)
Bluetooth Connectivity:
Not equipped with Bluetooth or smartphone integration
Engine Oil Change:
Every 1,000 miles (1600 km) or 6 months, whichever comes first
Air Filter Cleaning Replacement:
Clean every 1,000 miles (1600 km), replace as needed or every 2,000 miles (3200 km)
Spark Plug Inspection Replacement:
Inspect every 1,000 miles (1600 km), replace approximately every 3,000 miles (4800 km)
Belt Inspection Replacement:
Inspect CVT belt every 3,000 miles (4800 km), replace per manual recommendations (typically 10,000-15,000 miles)
Engine Oil Type:
Yamalube 4-stroke Motorcycle Oil 10W-40 or equivalent API SG or higher
Engine Oil Capacity:
Approx. 0.80 Liters (800 ml) with filter change
Coolant Type:
Yamaha Genuine Coolant (or equivalent ethylene glycol-based coolant with distilled water at 50/50 mix)
Common Wear Items:
CVT belt wear, spark plug fouling, carburetor jetting issues, suspension component wear
Electrical Concerns:
Occasional issues with regulator/rectifier failure or stator output, often due to heat or vibration.
Yamaha Motorcycle Division:
Yamaha Motor Company, established in 1955, with a long history in motorcycle and scooter manufacturing, known for performance and reliability.
Zuma Introduction:
The Zuma (known as BW'S 50 in many markets) was introduced to offer a more rugged, all-weather scooter with a distinctive style, differentiating it from typical city scooters.
Yw50Ap 2007 Significance:
Represents a key year in the first generation of the Zuma, refining its popular design and functionality.
Manufacturing Location:
Typically manufactured in Taiwan under Yamaha's global production network.
Segment Popularity:
Consistently a popular choice in the 50cc scooter market for its unique styling and off-road-inspired capabilities.
Consumer Reviews:
Generally well-regarded for its durability, practicality, and fun factor in urban environments.
Emissions Compliance:
Compliant with U.S. EPA and California Air Resources Board (CARB) emissions standards for its model year.
