Market Segment:
        
        
            Lightweight sport/commuter motorcycle, popular in Europe for its nimble handling and spirited performance for its class.
        
     
    
        
            Target Audience:
        
        
            Young riders, urban commuters, enthusiasts seeking an affordable and engaging entry-level sportbike.
        
     
    
    
        
            Key Competitors:
        
        
            Yamaha DT 125, Aprilia AF1 125, Honda NSR125, Suzuki RG125, Gilera SP01 125.
        
     
    
    
        
            Engine Type:
        
        
            High-revving liquid-cooled two-stroke single-cylinder engine, known for strong power output in its displacement class.
        
     
    
        
            Design Philosophy:
        
        
            Sporty styling inspired by larger Cagiva racing motorcycles, coupled with practical commuter capabilities.
        
     
    
        
            Handling:
        
        
            Agile and responsive chassis, often featuring adjustable suspension components for a sporty feel.
        
     
 
    
    
    
        
            Engine Overhaul:
        
        
            Complete disassembly, inspection, repair, and reassembly of the 125cc two-stroke engine.
        
     
    
        
            Fuel System Service:
        
        
            Carburetor tuning, cleaning, and rebuilding (likely Dell'Orto PHBH or similar), fuel tank, fuel lines, and petcock maintenance.
        
     
    
        
            Ignition System Diagnostics:
        
        
            CDI ignition system testing, spark plug selection, timing adjustments, and troubleshooting.
        
     
    
        
            Exhaust System Maintenance:
        
        
            De-carbonizing expansion chambers, muffler packing replacement, and leak checking.
        
     
    
        
            Cooling System Service:
        
        
            Liquid-cooled systems: radiator maintenance, coolant flushing, water pump inspection and seal replacement.
        
     
    
        
            Transmission Repair:
        
        
            Gearbox disassembly, inspection of gears and shift drum, clutch service (wet multi-plate), and gearbox oil change.
        
     
    
        
            Chassis And Frame Inspection:
        
        
            Frame integrity checks, swingarm bearing service, steering head bearing adjustment and replacement.
        
     
    
        
            Suspension Service:
        
        
            Front fork overhaul (seal replacement, oil viscosity and level), rear shock absorber inspection and replacement.
        
     
    
        
            Braking System Maintenance:
        
        
            Hydraulic front and rear brake systems: caliper overhaul, master cylinder servicing, brake pad replacement, fluid bleeding, and line inspection.
        
     
    
        
            Wheel And Tire Service:
        
        
            Wheel bearing replacement, spoke tensioning (if applicable), tire mounting and balancing, and valve stem replacement.
        
     
    
        
            Electrical System Troubleshooting:
        
        
            Wiring diagrams, lighting circuits, battery maintenance, starter motor, horn, and indicator system checks.
        
     
    
        
            Bodywork And Trim Repair:
        
        
            Fairing removal and installation, seat, tank cover, and panel fitment.
        
     
    
    
        
            Routine Maintenance:
        
        
            Oil changes, filter replacements, spark plug checks, chain adjustment and lubrication, brake adjustments.
        
     
    
        
            Diagnostic Procedures:
        
        
            Troubleshooting guides for common starting, running, and electrical issues based on symptom analysis.
        
     
    
        
            Component Replacement:
        
        
            Detailed step-by-step instructions for replacing major and minor components.
        
     
    
        
            Rebuild Instructions:
        
        
            Comprehensive rebuild procedures for the engine, carburetor, brake calipers, and master cylinders.
        
     
    
        
            Wiring Diagrams:
        
        
            Foldout wiring diagrams illustrating the complete electrical system.
        
     
    
    
        
            Technical Depth:
        
        
            Comprehensive, covering everything from basic rider maintenance to full engine and chassis rebuilds.
        
     
    
        
            Diagnostic Tools Required:
        
        
            Specifies required tools for diagnostics, including feeler gauges, torque wrenches, multimeter, compression tester.
        
     
    
        
            Torque Specifications:
        
        
            Detailed torque values for all critical fasteners across all systems.
        
     
    
        
            Tolerances And Clearances:
        
        
            Precise measurements for engine component clearances, bearing play, and other critical tolerances.
        
     
 
    
    
    
        
            Engine Type:
        
        
            Liquid-cooled, two-stroke, single-cylinder
        
     
    
        
            Bore X Stroke:
        
        
            Approximately 56 mm x 50.6 mm (typical for this class, check manual for exact spec)
        
     
    
        
            Displacement:
        
        
            124.6 cc (125cc)
        
     
    
        
            Compression Ratio:
        
        
            Approximately 7.5:1 to 8.5:1 (check manual)
        
     
    
        
            Valve Train:
        
        
            Reed valve induction (typical for 2-stroke)
        
     
    
    
        
            Horsepower:
        
        
            Estimated 28-32 HP at 9,000-10,000 RPM (Varies by market and specific tuning)
        
     
    
        
            Torque:
        
        
            Estimated 18-20 Nm at 8,000-9,000 RPM (Varies by market and specific tuning)
        
     
    
    
        
            Carburetor Model:
        
        
            Typically Dell'Orto PHBH 28/30mm or Mikuni VM28 (check manual for exact fitment)
        
     
    
        
            Fuel Type:
        
        
            Unleaded gasoline (RON 95 or higher) with 2-stroke oil pre-mix or automatic oil injection system.
        
     
    
        
            Oil Type:
        
        
            High-quality 2-stroke engine oil (JASO FD, API TC rated)
        
     
 
    
    
    
        
            Safety Standards:
        
        
            Conforms to European safety standards of the era. Specific crash ratings not typically applied to motorcycles of this period.
        
     
    
    
        
            Braking System:
        
        
            Front: Single disc with hydraulic caliper. Rear: Drum or disc brake (check specific model variant).
        
     
    
        
            Lighting:
        
        
            Halogen headlight, tail light, brake light, turn signals.
        
     
    
    
        
            Frame Construction:
        
        
            Steel perimeter or trellis frame for rigidity and rider safety.
        
     
    
        
            Tire Specification:
        
        
            Front: 100/80-17, Rear: 130/70-17 (typical, check manual for exact fitment and approved brands).
        
     
 
    
    
    
        
            Oil Change Interval:
        
        
            Every 3,000-5,000 km or annually (refer to manual for precise intervals based on usage).
        
     
    
        
            Spark Plug Check:
        
        
            Every 5,000 km.
        
     
    
        
            Air Filter Cleaning:
        
        
            Every 3,000 km or as needed in dusty conditions.
        
     
    
        
            Chain Lubrication Adjustment:
        
        
            Every 500-1,000 km and after washing or rain.
        
     
    
        
            Coolant Flush:
        
        
            Every 2 years or 20,000 km.
        
     
    
    
        
            Engine Oil Type:
        
        
            2-stroke premix oil (JASO FD, API TC) or dedicated 2-stroke injector oil.
        
     
    
        
            Gearbox Oil Type:
        
        
            API GL-4 or GL-5, SAE 75W/90 or 80W/90 hypoid gear oil. Capacity: ~1.0-1.2 Liters (check manual).
        
     
    
        
            Brake Fluid Type:
        
        
            DOT 3 or DOT 4 hydraulic brake fluid (check manual for specific recommendation).
        
     
    
        
            Coolant Type:
        
        
            Ethylene glycol based antifreeze coolant mixed 50/50 with distilled water.
        
     
    
    
        
            Carburetor Tuning:
        
        
            Sensitivity to altitude and temperature changes, requiring periodic adjustment or re-jetting for optimal performance.
        
     
    
        
            2-Stroke Engine Wear:
        
        
            Piston ring and cylinder wear can occur with high mileage or poor lubrication, necessitating rebuilds.
        
     
    
        
            Electrical Connections:
        
        
            Corrosion or loose connections in the wiring harness, particularly on older models, can lead to intermittent electrical faults.
        
     
    
        
            Clutch Slippage:
        
        
            Wear on clutch plates or incorrect adjustment can lead to clutch slippage, especially under heavy load.
        
     
    
        
            Suspension Leaks:
        
        
            Front fork seals can degrade over time, leading to oil leaks. Rear shock absorbers may lose damping effectiveness.
        
     
 
    
    
    
        
            Brand Origin:
        
        
            Cagiva is an Italian motorcycle manufacturer founded by the Castiglioni brothers in 1978, acquiring brands like Husqvarna and MV Agusta.
        
     
    
        
            Brand Focus:
        
        
            Cagiva was known for its sporty, often Italian-designed motorcycles, including dirt bikes, street bikes, and sportbikes.
        
     
    
    
        
            Development Context:
        
        
            The Super City 125 was part of Cagiva's strategy to offer competitive 125cc performance motorcycles, often featuring performance-oriented two-stroke engines.
        
     
    
        
            Design Inspiration:
        
        
            Likely drew design cues from Cagiva's successful racing efforts and larger displacement sportbikes of the era.
        
     
    
    
        
            Manufacturing Location:
        
        
            Primarily Italy.
        
     
    
        
            Production Period:
        
        
            1990s, with specific model year updates within the '1991 Onward' range covered by the manual.