Market Segment:
Compact, sporty urban scooter designed for agility and ease of use in city environments.
Competitors:
Competes with other 50cc scooters like the Honda Metropolitan, Kymco Agility 50, and SYM Fiddle II.
Design Philosophy:
Known for its distinctive 'supermoto' styling, upright riding position, and robust build quality for its class.
Target Audience:
Young riders, urban commuters, and those seeking an economical and fun mode of transportation.
Model Years Covered:
2005, 2006, 2007, 2008, 2009, 2010, 2011
Estimated Pages:
Varies based on specific model year, typically 300-500 pages for a comprehensive service manual.
Type:
Service and Repair Manual
Format:
Downloadable Digital Format (PDF)
Engine:
Detailed coverage of the 49cc 2-stroke engine, including disassembly, assembly, tuning, and troubleshooting.
Fuel System:
Carburetor servicing, fuel pump operation, fuel line maintenance, and fuel tank procedures.
Ignition System:
CDI unit, spark plug specifications, ignition coil testing, and timing adjustments.
Cooling System:
Air cooling system components and inspection.
Transmission Drive System:
Automatic continuously variable transmission (CVT) servicing, variator assembly, clutch, and final drive maintenance.
Chassis Frame:
Frame inspection, fork and suspension servicing, swingarm maintenance.
Braking System:
Front and rear brake servicing, including hydraulic systems (if applicable), brake pad replacement, and fluid checks.
Electrical System:
Wiring diagrams, battery maintenance, lighting system troubleshooting, starter motor, and charging system inspection.
Bodywork And Plastics:
Panel removal and installation, fairing repair, seat servicing, and storage compartment access.
Wheels And Tires:
Tire pressure specifications, wheel bearing maintenance, and tire replacement procedures.
Routine Maintenance:
Oil changes, air filter cleaning/replacement, spark plug checks, brake inspections, and general lubrication.
Troubleshooting:
Systematic diagnostic procedures for common and uncommon issues, with fault code identification if applicable.
Disassembly Assembly:
Step-by-step instructions for component removal, overhaul, and reassembly.
Rebuilding:
Comprehensive engine and transmission rebuild procedures with torque specifications.
Electrical Diagnostics:
Troubleshooting electrical circuits using wiring diagrams and multimeters.
Depth:
Intermediate to Advanced. Covers everything from basic maintenance to complete engine rebuilds and in-depth electrical diagnostics.
Engine Type:
4-stroke, Liquid-cooled, SOHC, 2-valve, Single Cylinder
Displacement:
49cc (Actual displacement may vary slightly by market, but typically around 49cc).
Bore X Stroke:
39.0 mm x 41.4 mm
Compression Ratio:
12.0 : 1
Horsepower:
Approximately 4.0-4.5 HP (Varies by market regulations and specific tuning).
Torque:
Approximately 2.8-3.0 lb-ft (Varies by market).
Carburetor:
Mikuni VM14-102 or similar (Specific model may vary).
Fuel Delivery:
Fuel pump and carburetor
Ignition System:
CDI (Capacitor Discharge Ignition)
Lubrication Type:
Wet Sump with Automatic Oil Injection
Cooling Method:
Forced Air Cooling
Overall Length:
Approx. 1700 mm (66.9 in)
Overall Width:
Approx. 710 mm (28.0 in)
Overall Height:
Approx. 1010 mm (39.8 in)
Wheelbase:
Approx. 1205 mm (47.4 in)
Dry Weight:
Approx. 76 kg (167.6 lbs)
Curb Weight:
Approx. 81 kg (178.6 lbs) (with all fluids and a full tank)
Load Capacity:
Typically rated for a rider and some cargo, consult manual for exact limits.
Crash Test Data:
N/A (As scooters are not typically subjected to automotive crash testing standards).
Brakes:
Front disc brake, rear drum brake.
Suspension:
Telescopic front fork, unit swing rear suspension.
Lighting:
Halogen headlight, taillight, brake light, and turn signals.
Tires:
Tubeless tires for improved puncture resistance.
Display:
Analog speedometer, fuel gauge, and indicator lights (turn signals, high beam, oil level).
Features:
N/A (Basic scooter with no advanced driver assistance systems).
Features:
N/A (No integrated connectivity features).
Oil Change Interval:
Recommended every 1,000-1,500 km (600-900 miles) or annually, check manual for specifics.
Air Filter Cleaning:
Check and clean every 1,000 km (600 miles), replace as needed.
Spark Plug Replacement:
Recommended every 3,000-4,000 km (1,800-2,500 miles), refer to manual for correct type and gap.
Cv Belt Inspection:
Inspect every 5,000 km (3,000 miles).
Engine Oil Type:
SAE 10W-30 API SG or higher, motorcycle specific lubricant.
Engine Oil Capacity:
Approx. 0.8 L (0.85 US qt) for oil change, 0.9 L (0.95 US qt) for total capacity.
Brake Fluid Type:
DOT 3 or DOT 4
2-Stroke Oil Type:
API TC, JASO FD, or higher 2-stroke premix oil.
Common Wear Items:
CVT belt wear, variator rollers, brake pads, and spark plug fouling are common maintenance items.
Electrical Connections:
Corrosion in electrical connectors can sometimes lead to intermittent issues, especially in humid climates.
Carburetor Tuning:
The 2-stroke carburetor may require periodic cleaning and tuning, especially if the scooter is stored for extended periods or used intermittently.
Yamaha Legacy:
Yamaha Motor Company has a long history in powersports, known for innovation and performance in motorcycles, scooters, and engines.
Zuma Introduction:
The Zuma (BW's in some markets) line was introduced to offer a rugged, adventure-styled scooter, diverging from the more conventional designs of its competitors.
Yw50Ap Generation:
The YW50AP represents the first generation of the Zuma, characterized by its aggressive styling and 50cc two-stroke engine.
Manufacturing Location:
Primarily manufactured in Taiwan, a common practice for many scooter manufacturers.
Production Years:
2001-2011 for this generation (though the manual covers 2005-2011).
Market Reputation:
Generally well-regarded for its durability and unique styling within the 50cc scooter market.
Reliability:
Yamaha's reputation for reliability extends to the Zuma, with many units providing long service lives when properly maintained.
Emissions:
Meets relevant emissions standards for its production years and markets. Specific certifications would be detailed in the service manual.
