Segment:
Lightweight, entry-level scooter for urban commuting and recreation
Competitors Late 80S:
Competed with other 50cc scooters from brands like Honda (e.g., Spree), Suzuki (e.g., AY50), and various European manufacturers.
Design:
Distinctive 'cruiser' inspired styling for a scooter of its era.
Practicality:
Automatic transmission, electric start, under-seat storage for convenience.
Primary Coverage:
Complete Service, Repair, and Maintenance
Estimated Pages:
Hundreds (Exact count not provided, but typical for a comprehensive service manual)
Type:
Service Repair Maintenance Manual
Format:
Printed (Typical for older manuals, digital PDFs often available)
Engine:
Disassembly, assembly, inspection, tuning, troubleshooting
Fuel System:
Carburetor adjustment, fuel lines, fuel pump inspection
Ignition System:
Spark plug, ignition coil, CDI unit testing and replacement
Transmission:
Automatic transmission (CVT), clutch, drive belt inspection and replacement
Brakes:
Front and rear brake systems, hydraulic lines, pad/shoe replacement
Suspension:
Front fork, rear shock absorber, bushings, bearing maintenance
Electrical System:
Wiring diagrams, battery, charging system, lighting, starter
Cooling System:
Air-cooled engine specifics, cooling fins
Exhaust System:
Muffler, exhaust pipe inspection and maintenance
Frame And Bodywork:
Chassis components, fairings, seat, storage compartment
Maintenance:
Scheduled maintenance, lubrication, filter changes, fluid checks
Troubleshooting:
Diagnostic procedures for common and uncommon issues
Repair:
Step-by-step repair instructions for all major components
Disassembly Assembly:
Detailed instructions for component removal and reinstallation
Technical Specifications:
Torque values, clearances, specifications for all parts
Wiring Diagrams:
Comprehensive electrical system schematics
Depth:
Comprehensive (from basic maintenance to complete engine rebuilds)
Digital Format:
Likely PDF if a digital version is sourced, offering searchability and print-on-demand.
Print Quality:
High-quality print for clarity of diagrams and text (for printed versions)
Binding:
Professional binding suitable for workshop use (e.g., spiral-bound or perfect-bound)
Paper Quality:
Durable, possibly glossy paper to withstand shop conditions and display diagrams clearly
Engine Type:
2-stroke, air-cooled, single-cylinder
Bore X Stroke:
39.0mm x 41.4mm (Typical for 49cc Yamaha motors of this era)
Compression Ratio:
7.0:1 (Typical)
Carburetor Model:
Mikuni VM14SC (Likely)
Horsepower:
Approx. 4.0 - 4.5 HP @ 7000 RPM (Est.)
Torque:
Not typically published for this class, but sufficient for light acceleration.
Fuel Delivery:
Carburetor
Fuel Type:
Unleaded gasoline with 2-stroke oil pre-mix or oil injection system (check model specifics)
Oil Mixture Ratio:
If oil injection: 1:100 (Yamalube 2 or equivalent) or refer to manual. If pre-mix: 50:1 (or as specified)
Overall Length:
Approx. 1700mm (66.9 inches)
Overall Width:
Approx. 670mm (26.4 inches)
Overall Height:
Approx. 1060mm (41.7 inches)
Wheelbase:
Approx. 1220mm (48.0 inches)
Dry Weight:
Approx. 70 kg (154 lbs)
Wet Weight:
Approx. 75 kg (165 lbs) (Est. with fluids)
Storage Capacity:
Under-seat storage compartment
Safety Standards:
Meets all relevant safety regulations for its class and year.
Braking System:
Front disc brake, rear drum brake for effective stopping power.
Lighting:
Headlight, taillight, brake light, turn signals for visibility.
Frame Construction:
Steel frame for chassis rigidity and rider support.
Oil Change Interval:
Refer to manual: Typically every 1000-2000 km for 4-stroke variants, or based on usage for 2-stroke oil injection.
Air Filter Cleaning:
Refer to manual: Typically every 1000-3000 km or as needed based on operating conditions.
Spark Plug Replacement:
Refer to manual: Typically every 3000-5000 km or based on spark plug type.
Drive Belt Inspection:
Refer to manual: Recommended inspection every 5000-10000 km for wear and tension, replacement as needed.
Transmission Oil:
Yamaha Gear Oil (or equivalent SAE 80 API GL-II) - Refer to manual for specific part number and quantity.
Coolant:
Not applicable (Air-cooled engine)
Common Wear Items:
Drive belt wear, carburetor gumming if not run regularly, potential aging electrical components (connectors, wiring).
Performance Degradation:
Loss of power can be due to clogged air filter, carburetor issues, worn drive belt, or exhaust restrictions.
Yamaha Motorcycles:
Yamaha Motor Corporation, founded in 1955, has a rich history in motorcycle manufacturing, known for innovation, performance, and reliability across various segments.
Zuma Lineage:
The Zuma line began with earlier models and evolved through various iterations, with the 'Zuma II' representing a specific generation of Yamaha's popular 50cc scooter offering.
Manufacturing Location:
Likely manufactured in Japan or other Yamaha global production facilities.
