Market Segment:
Sport Scooter / Personal Transport
Competitors Era:
Competed with other 50cc-80cc scooters from brands like Honda (Spree, Elite), Suzuki (FB series), Tomos, and various European manufacturers.
Design Philosophy:
Yamaha's focus on sporty design, reliable performance, and practical urban mobility.
Target Audience:
Young riders, commuters seeking efficient and stylish personal transportation.
Coverage:
Comprehensive service, repair, and maintenance
Page Count:
Varies (typical range for this era's service manuals is 200-400 pages)
Manual Type:
Service Repair Maintenance Manual
Format:
Likely printed (original) or PDF (digital reproduction)
Engine:
Engine disassembly, assembly, component inspection, tuning, specifications
Fuel System:
Carburetor specifications, adjustments, fuel pump, fuel lines, tank maintenance
Electrical System:
Ignition system, charging system (stator, rectifier/regulator), starter motor, lighting, wiring diagrams
Transmission:
Automatic transmission (CVT type) operation, maintenance, internal components, fluid specifications
Suspension:
Front fork assembly, rear shock absorber, linkage maintenance, specifications, adjustments
Brakes:
Front and rear brake systems, hydraulic lines, calipers, master cylinder, pad replacement, bleeding procedures
Chassis And Frame:
Frame inspection, component mounting, steering system maintenance
Bodywork:
Fairing removal, installation, minor body repairs, seat maintenance
Cooling System:
Liquid cooling system (if applicable), coolant type, radiator maintenance
Maintenance:
Scheduled maintenance, oil changes, filter replacements, spark plug replacement, brake fluid service, coolant checks
Troubleshooting:
Diagnostic charts, common problems and solutions, electrical system diagnostics
Repair:
Detailed step-by-step repair instructions for all major systems, component overhaul
Disassembly And Assembly:
Complete breakdown and reassembly of engine, transmission, and other major components
Specifications And Measurements:
Torque values, clearances, tolerances, fluid capacities, electrical specifications
Depth:
In-depth mechanical and electrical repair, from basic tune-ups to complete engine rebuilds and system diagnostics
File Format:
If digital: PDF, searchable text, bookmark enabled
Print Quality:
If printed: High-quality paper, clear diagrams, professional printing
Binding Type:
If printed: Spiral-bound or perfect-bound for lay-flat use
Paper Type:
If printed: Durable, gloss-coated paper for resistance to shop environments
Engine Type:
Two-stroke, air-cooled
Displacement:
70cc (approximate, often designated as 80cc for marketing)
Bore X Stroke:
Typically around 45mm x 42mm (specifics in manual)
Compression Ratio:
Around 7.0-7.5:1 (specifics in manual)
Horsepower:
Approx. 6-7 HP (specifics in manual)
Torque:
Approx. 4-5 lb-ft (specifics in manual)
Carburetor Type:
Single Mikuni VM series (e.g., VM18, specific size in manual)
Fuel Type:
Unleaded gasoline (87 octane recommended, check manual for specifics)
Fuel Mixture:
Pre-mix (if separate oil tank not present) or oil injection system (check manual for specific implementation)
Transmission Type:
Automatic Continuously Variable Transmission (CVT)
Drive Type:
V-belt drive to rear wheel
Gear Reduction:
Variable ratio via CVT system
Transmission Fluid:
Specific ATF (Automatic Transmission Fluid) type required, refer to manual for exact specification and capacity.
Length:
Approx. 1700mm (specifics in manual)
Width:
Approx. 650mm (specifics in manual)
Height:
Approx. 1050mm (specifics in manual)
Dry Weight:
Approx. 75-85 kg (specifics in manual)
Fuel Tank Capacity:
Approx. 4.0 - 5.0 Liters (specifics in manual)
Safety Standards:
Adherence to prevailing safety regulations for light motorcycles/scooters of the era.
Braking System:
Front disc brake, rear drum brake configuration typical for this model.
Lighting:
Headlight, taillight, brake light, turn signals for visibility.
Frame Construction:
Steel tube frame designed for stability and rider control.
Instrument Cluster:
Basic analog gauges: Speedometer, Fuel Gauge, Odometer, Indicator lights (turn signals, high beam).
Lighting System:
Halogen headlight, electric start, and integrated turn signals.
Diagnostic Ports:
Basic electrical testing points, no advanced OBD-II or digital diagnostic ports.
Oil Change Interval:
Every 1000-1500 km or annually (check manual for exact interval and oil type).
Spark Plug Replacement:
Every 3000-5000 km or as per manual recommendation.
Air Filter Cleaning Replacement:
Every 1000-2000 km, depending on operating conditions.
Engine Oil Type:
Yamaha recommends specific 2-stroke oil, pre-mix or injection type depending on configuration. Check manual for exact API service classification and viscosity grade.
Gearbox Oil Type:
Specific gear oil for transmission unit, capacity and grade found in manual.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid (check manual for specific recommendation).
Carburetor Clogging:
Common with older 2-stroke scooters due to fuel degradation or debris. Regular cleaning recommended.
Cvt Belt Wear:
Wear and tear on the V-belt can lead to reduced acceleration and slippage. Check for cracks and proper tension.
Electrical Connector Corrosion:
Age can lead to corrosion in electrical connectors, affecting lighting, ignition, and charging.
Cylinder Wear:
High mileage or poor maintenance can lead to cylinder and piston ring wear, affecting compression and performance.
Yamaha Motors:
Yamaha Motor Company, established in 1955, has a strong legacy in motorcycles, musical instruments, and other motorized products, known for innovation and performance.
Riva Series:
The RIVA series was Yamaha's entry into the burgeoning scooter market, offering stylish and practical personal transport solutions. The RIVA 80 followed smaller displacement models like the RIVA 50.
Production Period:
Mid-to-late 1980s, specifically around 1983-1989 for the RIVA series, with the 80cc variant prominent in the mid-80s.
