Market Segment:
Lightweight sport motorcycle (125cc supersport class)
Target Audience:
Young riders, enthusiasts seeking performance and style in the 125cc category.
Key Competitors:
Yamaha TZR 125, Suzuki RG 125 Gamma, Aprilia RS 125 (later models), Honda NSR 125.
Design Philosophy:
Aspirational supersport styling mirroring larger Cagiva models, advanced chassis and suspension for its class.
Aerodynamics:
Full fairing designed for aerodynamic efficiency and distinctive Italian styling.
Handling:
Sport-oriented chassis geometry and suspension setup for agile handling.
Engine Overhaul:
Complete engine disassembly, inspection, repair, and reassembly procedures.
Fuel System:
Carburetor adjustment and overhaul (Dell'Orto PHBH/PHSB), fuel pump, fuel lines, fuel tank.
Ignition System:
CDI ignition system, spark plug specifications, timing adjustment, coil testing.
Cooling System:
Liquid cooling system, radiator, water pump, thermostat, coolant specifications and bleeding procedures.
Exhaust System:
Exhaust pipe and silencer maintenance and inspection.
Transmission Clutch:
Gearbox disassembly, inspection, and repair; clutch assembly, adjustment, and friction plate replacement.
Suspension Front:
Telescopic front fork (e.g., Marzocchi or Paioli) disassembly, oil change, seal replacement, and adjustment.
Suspension Rear:
Monoshock rear suspension system, shock absorber adjustment and overhaul, linkage maintenance.
Brakes Front:
Disc brake system, caliper overhaul, pad replacement, hydraulic fluid specifications and bleeding.
Brakes Rear:
Disc brake system, caliper overhaul, pad replacement, hydraulic fluid specifications and bleeding.
Wheels Tires:
Wheel bearing inspection and replacement, tire pressure recommendations, wheel balancing.
Electrical System:
Wiring diagrams, battery maintenance, lighting system, starter motor, alternator/stator testing.
Bodywork Chassis:
Frame inspection, fairing removal and installation, seat, fuel tank, and minor body panel repairs.
Routine Maintenance:
Oil changes, filter replacements, chain adjustment, spark plug checks, lubrication points.
Troubleshooting Guides:
Diagnostic procedures for common starting, running, and electrical issues.
Engine Rebuild:
Piston, cylinder, crankshaft, and connecting rod replacement and measurement specifications.
Carburetor Tuning:
Detailed steps for jetting, float height adjustment, and idle speed control.
Brake Bleeding:
Step-by-step instructions for purging air from the hydraulic brake system.
Fork Seal Replacement:
Comprehensive guide to disassembling and reassembling front forks for seal replacement.
Electrical Component Testing:
Methods for testing CDI units, ignition coils, regulators, and other electrical parts using a multimeter.
Wheel Bearing Replacement:
Guidance on removing and installing wheel bearings.
Technical Depth:
Comprehensive (from basic maintenance to complete engine and chassis rebuilds)
Diagnostic Capability:
Detailed troubleshooting sections with symptom-to-cause correlation.
Torque Specifications:
Includes critical torque values for engine, chassis, and brake components.
Tolerances And Clearances:
Specific measurements for critical engine parts like piston-to-cylinder clearance, bearing clearances.
Engine Type:
2-stroke, liquid-cooled
Engine Displacement:
124.5 cc
Bore X Stroke:
56 mm x 50.6 mm
Compression Ratio:
Approx. 7.4:1 (variable by variant/region, often lower for emission compliance)
Cylinder Configuration:
Single-cylinder, reed valve intake
Horsepower Peak:
Approx. 30-32 HP @ 11,000 RPM (varies by market restrictions)
Torque Peak:
Approx. 19 Nm @ 10,500 RPM
Carburetor Model:
Dell'Orto PHBH 30 or PHSB 30 (common)
Fuel Delivery:
Gravity feed from fuel tank to carburetor.
Fuel Type:
Unleaded gasoline (RON 95 recommended), requires 2-stroke oil premixed or via oil injection system.
Lubrication System:
Pre-mix or separate oil injection system (depending on specific C9 variant).
Engine Oil Change:
Every 3,000-5,000 km or annually, check manual for specific recommendation.
Spark Plug Replacement:
Inspect every 5,000 km, replace as needed (refer to manual for specific plug type and gap).
Air Filter Cleaning:
Clean every 5,000 km, replace every 10,000-15,000 km.
Chain Lubrication:
Lubricate and adjust chain every 1,000 km or as needed.
Fork Oil Change:
Recommended every 10,000-15,000 km or if fork performance degrades.
Coolant Type:
Ethylene glycol based antifreeze mixture (50/50 with distilled water recommended).
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid (refer to manual for exact specification).
2 Stroke Oil Type:
High-quality 2-stroke synthetic or semi-synthetic oil (API TC, JASO FD or FD compliant).
Known Issues List:
Typical issues include carburetor gumming due to infrequent use, wear on reed valves, aging electrical connectors, and fork seal leaks. Overheating can occur if cooling system is not maintained. Two-stroke engines require diligent maintenance.
Brand Origin:
Cagiva is an Italian motorcycle manufacturer, known for its sporty and performance-oriented machines.
Brand Focus:
Historically focused on 2-stroke performance and racing heritage, particularly in smaller displacement classes.
Predecessor:
Models like the Cagiva Mito 125 (which evolved from this platform) and earlier Cagiva 125 models.
Successor:
The Freccia platform paved the way for the highly successful Cagiva Mito series.
Design Influences:
Features a design language heavily influenced by larger sportbikes of the era, aiming for a 'big bike' feel in a 125cc package.
Manufacturing Location:
Italy
Production Period:
The C9 model designation specifically covers the 1988-1990 production years.