Category:
        
        
            Lightweight Scooter
        
     
    
        
            Target Audience:
        
        
            Urban commuters, recreational riders.
        
     
    
    
        
            Key Competitors:
        
        
            Honda Elite, Suzuki Address, Kawasaki Cavalon (during various model year overlaps).
        
     
    
    
        
            Aerodynamics:
        
        
            Streamlined bodywork for efficient urban travel and weather protection.
        
     
    
        
            Practicality:
        
        
            Automatic transmission, under-seat storage, easy to operate.
        
     
    
        
            Performance:
        
        
            Adequate power for city riding and light highway use.
        
     
 
    
    
    
        
            Powertrain:
        
        
            Engine, transmission, final drive, fuel system, cooling system, exhaust system.
        
     
    
        
            Chassis:
        
        
            Frame, suspension (front and rear forks), steering, wheels, tires.
        
     
    
        
            Brakes:
        
        
            Front and rear brake systems (drum/disc), hydraulic components, fluid specifications.
        
     
    
        
            Electrical:
        
        
            Ignition system, starting system, charging system, lighting, wiring diagrams, battery.
        
     
    
        
            Bodywork And Trim:
        
        
            Body panels, seat, fairings, storage compartments, fasteners.
        
     
    
    
        
            Maintenance:
        
        
            Routine checks, oil changes, filter replacements, lubrication, spark plug service, brake adjustments.
        
     
    
        
            Repair And Rebuild:
        
        
            Engine overhaul, transmission disassembly and reassembly, carburetor tuning, electrical component replacement.
        
     
    
        
            Troubleshooting:
        
        
            Diagnostic procedures for common issues, symptom-based problem solving.
        
     
    
        
            Specifications:
        
        
            Torque values, clearances, fluid capacities, electrical resistance.
        
     
    
    
        
            Depth:
        
        
            Detailed step-by-step repair instructions, exploded views, technical drawings, and diagnostic charts suitable for professional mechanics and experienced DIY enthusiasts.
        
     
 
    
    
    
        
            Engine Type:
        
        
            Four-stroke, single-cylinder, air-cooled
        
     
    
        
            Displacement:
        
        
            124 cc (Approximate)
        
     
    
        
            Bore X Stroke:
        
        
            Variable by specific model year, typically around 54.0 mm x 54.5 mm
        
     
    
        
            Compression Ratio:
        
        
            Typically 9.5:1 to 10.0:1
        
     
    
    
        
            Horsepower:
        
        
            Approx. 8-10 HP @ 7500 RPM (varies by year/tuning)
        
     
    
        
            Torque:
        
        
            Approx. 7-8 lb-ft @ 6000 RPM (varies by year/tuning)
        
     
    
    
        
            Carburetor:
        
        
            Mikuni VM series (e.g., VM26 or similar, specific model may vary).
        
     
    
        
            Fuel Type:
        
        
            Unleaded gasoline, minimum 87 octane
        
     
    
    
        
            Cooling Method:
        
        
            Air-cooled
        
     
 
    
    
    
        
            Length:
        
        
            Approx. 1900 mm (varies slightly by year)
        
     
    
        
            Width:
        
        
            Approx. 670 mm (varies slightly by year)
        
     
    
        
            Height:
        
        
            Approx. 1100 mm (varies slightly by year)
        
     
    
    
        
            Dry Weight:
        
        
            Approx. 105-115 kg (varies by year)
        
     
    
        
            Gross Vehicle Weight Rating:
        
        
            Check specific model plate; typically around 250 kg
        
     
    
    
        
            Front Tire Size:
        
        
            3.50-10 4PR
        
     
    
        
            Rear Tire Size:
        
        
            3.50-10 4PR
        
     
    
    
        
            Fuel Tank Capacity:
        
        
            Approx. 6.0 - 7.0 Liters (includes reserve, varies by year)
        
     
 
    
    
    
        
            Engine Oil Change:
        
        
            Every 3,000 km or 6 months, whichever comes first.
        
     
    
        
            Air Filter Cleaning:
        
        
            Every 3,000 km or 6 months; replace every 6,000 km or 12 months.
        
     
    
        
            Spark Plug Replacement:
        
        
            Every 6,000 km or 12 months.
        
     
    
        
            Valve Clearance Check:
        
        
            Every 12,000 km or 24 months.
        
     
    
    
        
            Engine Oil Type:
        
        
            Yamaha Genuine 4-Stroke Scooter Oil or equivalent API SG, SAE 10W-30 or 20W-40 (check manual for specific year recommendation).
        
     
    
        
            Brake Fluid Type:
        
        
            DOT 3 or DOT 4 hydraulic brake fluid.
        
     
    
    
        
            Carburetor Cleaning:
        
        
            Carburetors can become gummed up with age, leading to starting issues or rough running. Regular cleaning and proper fuel storage are key.
        
     
    
        
            Cvt Belt Wear:
        
        
            The CVT drive belt will wear over time and require replacement to maintain proper acceleration and performance. Check for cracks or glazing.
        
     
    
        
            Electrical Connections:
        
        
            Corrosion on electrical connectors can lead to intermittent faults or non-operation of lights and ignition.
        
     
    
        
            Fuel System Maintenance:
        
        
            Ensure fuel petcock is functioning correctly and fuel lines are not brittle or leaking.
        
     
 
    
    
    
        
            Yamaha Motorcycles:
        
        
            Yamaha Motor Corporation is renowned for its innovation and quality in motorcycles, scooters, and powersports vehicles, with a strong history dating back to 1955.
        
     
    
    
        
            Riva Lineup:
        
        
            The Riva series was Yamaha's line of stylish and practical scooters designed for urban mobility. The 125/125Z models offered a good balance of performance and efficiency for their era.
        
     
    
    
        
            Production Period:
        
        
            The RIVA 125/Z models were produced from the mid-1980s through the early 2000s, evolving subtly through different model years.