Category:
Commuter Scooter, Urban Mobility
Target Audience:
Urban commuters, delivery services, individuals seeking an economical and maneuverable form of transportation.
Competitors:
Honda Metropolitan, Genuine Buddy, Kymco Agility 50, Aprilia Scarabeo 50, CPI GTR 50.
Features:
Distinctive rugged styling, comfortable seating, ample under-seat storage, reliable 4-stroke engine, lightweight and agile handling, easy to operate.
Benefit:
Enables owners and technicians to perform all necessary maintenance and repairs, saving significant costs on dealership labor and parts markups. Empowers DIYers with the knowledge to keep their Zuma 50 running optimally.
Engine:
Complete engine disassembly, assembly, inspection, troubleshooting, and repair for the 4-stroke, 2-valve, SOHC engine.
Fuel System:
Carburetor assembly and adjustment, fuel delivery system, fuel tank, fuel filter.
Ignition System:
CDI ignition system, spark plug specifications, troubleshooting ignition faults.
Transmission:
CVT (Continuously Variable Transmission) operation, belt replacement, clutch assembly, final drive.
Cooling System:
Air cooling system components and maintenance.
Electrical System:
Wiring diagrams, charging system (stator, regulator/rectifier), battery maintenance, starter system, lighting system (headlight, taillight, signals), horn.
Brakes:
Front and rear brake systems (typically drum or disc), brake fluid, brake pad/shoe replacement, brake cable adjustment.
Suspension:
Front fork assembly and maintenance, rear shock absorber, swingarm.
Steering:
Handlebar assembly, steering stem bearings, troubleshooting steering play.
Chassis Frame:
Frame inspection, sub-frame components.
Bodywork Trim:
Plastic panel removal and installation, seat, body decals.
Wheels Tires:
Wheel removal and installation, tire inspection and replacement, wheel balance.
Routine Maintenance:
Oil changes, filter replacements, spark plug checks, drive belt inspection, brake adjustments, tire pressure checks.
Troubleshooting:
Diagnosis of common starting issues, running problems, electrical faults, and performance complaints.
Engine Repair:
Top-end rebuild (cylinder, piston, rings), valve adjustment, gasket replacement, seal replacement.
Transmission Repair:
CVT belt replacement, clutch shoe replacement, gear oil change.
Electrical Repair:
Diagnosing and repairing charging system faults, starter motor issues, lighting problems, wiring harness repairs.
Brake Service:
Brake pad/shoe replacement, brake cable adjustment, caliper/wheel cylinder inspection.
Suspension Service:
Front fork oil change, seal replacement, rear shock replacement.
Bodywork Refurbishment:
Removal and installation of body panels, seat, and other cosmetic components.
Depth:
Comprehensive: Covers everything from basic scheduled maintenance and inspections to advanced engine rebuilds, electrical diagnostics, and component overhauls.
Engine Type:
4-stroke, 2-valve, SOHC
Displacement:
49cc (Cubic Centimeters)
Bore X Stroke:
39.0 mm x 41.4 mm (Typical)
Compression Ratio:
12.0:1 (Typical)
Cooling System:
Forced Air Cooling
Horsepower:
Approx. 3.6 HP @ 7,500 RPM (Actual may vary slightly by market and tuning)
Torque:
Approx. 2.6 lb-ft @ 7,000 RPM (Actual may vary)
Fuel Delivery:
Carburetor (Mikuni VM16SH or similar)
Fuel Type:
Unleaded Gasoline (91 octane or higher recommended)
Fuel Tank Capacity:
Approx. 1.5 US Gallons (5.7 Liters)
Length:
Approx. 73.1 inches (1856 mm)
Width:
Approx. 27.5 inches (698 mm)
Height:
Approx. 43.3 inches (1100 mm)
Wheelbase:
Approx. 50.4 inches (1280 mm)
Dry Weight:
Approx. 194 lbs (88 kg)
Curb Weight:
Approx. 207 lbs (94 kg) (With all fluids)
Weight Capacity:
Refer to owner's manual for specific rider and cargo limits.
Storage:
Under-seat storage compartment, front glove box (location may vary).
Safety Standards:
Complies with relevant CPSC (Consumer Product Safety Commission) and DOT (Department of Transportation) standards for scooters where applicable.
Braking System:
Front: Disc brake; Rear: Drum brake (typical configuration).
Lighting:
Halogen headlight, LED taillight, turn signals.
Frame Construction:
Steel tube frame designed for stability and maneuverability.
Tires:
Typically tubeless, multi-terrain pattern for urban use (e.g., 120/90-10 front, 130/90-10 rear).
Engine Oil Change:
Every 3,000 km (1,860 miles) or 6 months, whichever comes first.
Air Filter Cleaning:
Every 3,000 km (1,860 miles). Replace if damaged.
Spark Plug Inspection:
Every 3,000 km (1,860 miles). Replace as needed.
Cvtvbelt Inspection:
Inspect every 6,000 km (3,720 miles). Replace if worn or damaged.
Valve Adjustment:
Every 6,000 km (3,720 miles).
Brake Fluid Check:
Check level every 3,000 km (1,860 miles). Replace every 2 years.
Engine Oil Type:
Yamalube 4 (10W-40) or SAE 10W-40 API SG or higher.
Engine Oil Capacity:
0.80 Liters (0.85 US Quarts) for oil change without filter replacement; 0.90 Liters (0.95 US Quarts) for oil change with filter replacement.
Brake Fluid Type:
SAE J1703 or DOT 3.
Common Problems:
Carburetor clogging due to infrequent use or poor fuel quality, drive belt wear, weak starter motor (especially on older units), occasional electrical connection issues, front fork seal leaks.
Brand Focus:
Yamaha Motor Company is renowned globally for its expertise in motorcycles, marine products, and musical instruments. In the scooter segment, Yamaha is known for reliable and well-engineered vehicles.
Yw50 Heritage:
The Zuma line, known for its rugged styling and all-terrain capability (for a scooter), debuted in the US market in 2001 as the YW50. The YW50AP represents an evolution of this popular model, featuring the liquid-cooled 2-stroke previously, but by 2002 shifted to the more fuel-efficient and emissions-compliant air-cooled 4-stroke engine for the specific 'AP' designation and years covered.
Manufacturing Location:
While Yamaha products are manufactured globally, specific assembly for many models sold in North America may occur in various locations, including facilities within the United States or partner countries.
