Vehicle Segment:
Urban Scooter / Commuter Motorcycle
Target Audience:
Commuters, urban riders, light off-road enthusiasts, DIY mechanics.
Key Competitors:
Honda PCX125, Kymco Agility 125, SYM Jet 125, Aprilia SR50 (in terms of urban mobility segment).
Design Philosophy:
Rugged, versatile, and fun-to-ride scooter with a distinctive styling and off-road inspired features.
Versatility:
Capable of comfortable urban commuting and light trail riding due to its larger wheels and suspension.
Engine Systems:
Engine disassembly, assembly, inspection, maintenance, troubleshooting, tuning, cooling system, lubrication system, fuel system (carburetor/injection), ignition system, exhaust system, starter system.
Drivetrain Systems:
Transmission (CVT/automatic), clutch, final drive, drive belt inspection and replacement.
Chassis Systems:
Frame inspection, front fork/suspension, rear shock absorber, steering system, wheel bearings, wheel replacement.
Braking Systems:
Front and rear brake systems (disc/drum), brake fluid replacement, bleeding, pad/shoe replacement, caliper/master cylinder inspection.
Electrical Systems:
Wiring diagrams, battery maintenance, charging system (stator, rectifier/regulator), lighting system (headlight, taillight, turn signals), ignition system components, instrument panel.
Bodywork And Trim:
Panel removal and installation, seat, fairings, fenders, storage compartment.
Maintenance Procedures:
Oil changes, air filter cleaning/replacement, spark plug replacement, drive belt inspection, brake adjustments, coolant checks (if applicable), tire pressure checks.
Repair Procedures:
Engine overhaul, carburetor tuning/cleaning, transmission overhaul, suspension component replacement, electrical component diagnostics and replacement, brake system overhaul.
Troubleshooting Guides:
Diagnostic flowcharts for common starting, running, and electrical issues.
Diagnostic Capabilities:
Detailed troubleshooting for mechanical and electrical faults, including symptom identification and resolution steps.
Rebuild Instructions:
Comprehensive instructions for complete engine and transmission rebuilds, including component tolerances and specifications.
Assembly Disassembly:
Step-by-step procedures for the removal and installation of all major and minor components.
Engine Type:
125 cc, 4-stroke, single-cylinder, SOHC (Single Overhead Camshaft), Air-cooled
Bore X Stroke:
52.4 mm x 57.9 mm (Typical for this engine configuration)
Compression Ratio:
10.0:1 (Typical for this engine configuration)
Horsepower:
Approx. 9.7 HP @ 7,500 RPM (Representative figure for this class)
Torque:
Approx. 7.0 lb-ft @ 6,000 RPM (Representative figure for this class)
Fuel Delivery:
Fuel Injection (FI) or Carburetor (Specific model year dependent, early models often had FI)
Fuel Type:
Unleaded gasoline
Oil Type:
Yamalube 4 (or equivalent SAE 10W-40 API SG or higher, JASO MA)
Oil Capacity:
0.80 L (0.85 US qt) without filter change, 0.90 L (0.95 US qt) with filter change (Typical)
Ignition System:
TCI (Transistor Controlled Ignition) or CDI (Capacitor Discharge Ignition)
Spark Plug Type:
NGK CR7E (or equivalent)
Instrument Cluster:
Digital LCD display with speedometer, odometer, trip meter, fuel gauge, clock.
ABS:
Optional (Available on some later models or specific markets, not standard on all YW125Y variants)
Connectivity Features:
N/A (Basic scooter, no advanced connectivity features)
Engine Oil Change:
Every 3,000 km (1,800 miles) or 6 months, whichever comes first.
Air Filter Maintenance:
Clean every 3,000 km (1,800 miles), replace every 6,000 km (3,600 miles).
Spark Plug Replacement:
Every 10,000 km (6,000 miles).
Drive Belt Inspection:
Every 5,000 km (3,000 miles), replace as needed (typically around 20,000 km or 12,000 miles).
Brake Fluid Type:
DOT 3 or DOT 4
Common Wear Items:
Drive belt wear, brake pad/shoe wear, tire wear, spark plug fouling (less common with FI).
Potential Faults:
Occasional issues with fuel pump (FI models) or carburetor adjustments, stator coil failure, rectifier/regulator failure.
Yamaha Legacy:
Yamaha Motor Company, established in 1955, is renowned for its extensive range of motorcycles, ATVs, watercraft, and other powersports products, known for innovation, performance, and reliability.
Zuma Lineage:
The Zuma 125 (YW125Y) was introduced as a successor to the popular Zuma 50 (BW50), offering a larger displacement for increased performance and versatility. It bridged the gap between lightweight scooters and larger motorcycles.
Production Period:
First generation produced from 2008 onwards, with updates in subsequent years.
Manufacturing Origin:
Primarily manufactured in Indonesia, with components sourced globally.
