Segment:
Lightweight scooter, popular for urban commuting and recreational use.
Competitors:
Honda Spree, Honda Elite, Honda Aero, Suzuki F-Series, Kawasaki Invader (during its production run).
Design Philosophy:
Emphasis on reliability, ease of use, fuel efficiency, and affordability. Iconic 1980s/90s scooter design.
Target Audience:
New riders, commuters, individuals seeking economical transportation, vintage scooter enthusiasts.
Covered Years:
1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
Estimated Page Count:
300-450 (typical for comprehensive service manuals of this era and type)
Type:
Service and Repair Manual
Engine Mechanical:
Full overhaul procedures, component testing, carburetor tuning, ignition system diagnostics, lubrication system, cooling system (air-cooled specifics).
Transmission Drivetrain:
Automatic transmission (CVT or similar) operation, maintenance, inspection, and repair; final drive assembly, belt drive system (if applicable).
Electrical System:
Wiring diagrams, lighting system, charging system (stator, rectifier/regulator), starter system, battery, fuses, relays, ignition system components.
Chassis Suspension:
Front fork (telescopic), rear suspension (shock absorber(s), swingarm), steering system (handlebars, steering stem, bearings).
Braking System:
Front and rear brake systems (drum or disc, depending on variant), brake fluid specifications, bleeding procedures, component replacement.
Fuel System:
Fuel tank, fuel lines, fuel petcock (if applicable), carburetor components, fuel filter.
Bodywork Trim:
Body panel removal and installation, seat, fairings, storage compartment, decals, cosmetic component replacement.
Routine Maintenance:
Oil changes, filter replacements (air, oil if applicable), spark plug checks and replacement, brake adjustments, chain adjustment (if applicable), tire pressure checks.
Troubleshooting:
Diagnostic flowcharts for common issues such as starting problems, poor performance, electrical faults, and braking issues.
Engine Repair:
Piston and ring replacement, cylinder head disassembly and reassembly, valve adjustment (if applicable), crankshaft and connecting rod inspection.
Transmission Repair:
CVT belt inspection and replacement, clutch shoe inspection, variator and torque driver servicing.
Electrical Diagnostics:
Component testing using multimeters, fault finding based on symptoms, rewiring procedures (for specific issues).
Suspension Fork Rebuild:
Front fork oil change and seal replacement procedures.
Brake System Overhaul:
Caliper overhaul, brake pad replacement, drum shoe replacement, bleeding the brake lines.
Depth:
Comprehensive (from basic maintenance to full engine and transmission rebuilds, including detailed electrical diagnostics).
Engine Type:
Four-stroke, air-cooled, single-cylinder
Displacement:
124cc (approximate, specific variants may exist)
Bore X Stroke:
52.0 mm x 57.9 mm (typical for this displacement and engine family)
Compression Ratio:
9.5:1 (typical)
Valve Train:
SOHC, 2 valves per cylinder
Horsepower:
Approximately 9-10 HP @ 7500 RPM (estimated, dependent on specific model year and tuning)
Torque:
Approximately 7.5-8.5 lb-ft @ 6000 RPM (estimated)
Carburetor Type:
Mikuni VM Series (e.g., VM18 or similar, specific model may vary)
Fuel Type:
Unleaded gasoline, 87 octane (minimum)
Oil Type:
Yamalube 4 (or SAE 10W-40 API SE, SF, SG, SH, SJ classification) motorcycle oil
Oil Capacity:
Approximately 1.0 - 1.2 Liters (including filter change, refer to manual for exact spec)
Length:
Approximately 1800-1900 mm (typical for this class of scooter)
Width:
Approximately 650-700 mm
Height:
Approximately 1100-1150 mm
Wheelbase:
Approximately 1250-1300 mm
Dry Weight:
Approximately 95-105 kg (typical)
Curb Weight:
Approximately 105-115 kg (typical, with fluids)
Gross Vehicle Weight Rating:
Refer to specific model VIN plate; typically around 230-250 kg.
Storage Capacity:
Under-seat storage compartment (sufficient for a full-face helmet or groceries).
Crash Test Ratings:
N/A (Motorcycle/Scooter safety testing protocols differ significantly from automobiles; emphasis is on rider protection and vehicle stability).
Braking System:
Hydraulic front disc brake and rear drum brake (or dual drum brakes on some variants), designed for responsive stopping power.
Lighting System:
Headlight, taillight, brake lights, turn signals for visibility.
Chassis Design:
Robust frame construction providing stability and rider support.
Wheels Tires:
Tubeless tires, typically 10-inch or 12-inch diameter, providing good road grip.
Engine Oil Change:
Every 2,000 km or 6 months, whichever comes first.
Air Filter Cleaning:
Every 1,000 km; replacement as needed or every 4,000 km.
Spark Plug Check:
Every 2,000 km; replacement recommended every 6,000 km.
Cvt Belt Inspection:
Every 4,000 km; replacement recommended every 10,000-12,000 km or if signs of wear are present.
Brake System Check:
Every 4,000 km (pads/shoes, fluid level, lines).
Engine Oil Grade:
SAE 10W-40 API SE/SF/SG/SH/SJ
Brake Fluid Type:
DOT 3 or DOT 4 (check specific model year for exact specification).
Transmission Gear Oil:
Yamaha Hypoid Gear Oil SAE 80W-90 (or equivalent API GL-4 specification) - if applicable to final drive.
Carburetor Clogging:
Common issue due to infrequent use or stale fuel, leading to starting problems or rough running. Requires cleaning and tuning.
Cvt Belt Wear:
Belt can wear out over time, causing slippage, reduced acceleration, and potential failure. Regular inspection and timely replacement are crucial.
Stator Failure:
Can lead to charging system issues, resulting in a dead battery or inability to start the engine.
Exhaust Leaks:
Gaskets or pipes can degrade over time, causing exhaust leaks and a loss of performance.
Manufacturer Legacy:
Yamaha Motor Corporation is a global leader in powersports, known for innovation, performance, and quality across motorcycles, ATVs, personal watercraft, and marine engines.
Introduction Period:
The RIVA line was a significant part of Yamaha's entry and growth in the scooter market during the 1980s and 1990s, evolving through various engine sizes and styling updates.
Production Years Range:
1983-2001 (RIVA line encompassed various displacements like 50cc, 80cc, 125cc, 200cc, etc. The 125cc model specifically covered the 1985-2001 period).
Manufacturing Locations:
Primarily Japan, with potential assembly in other regions depending on market demand.
