Segment:
High-performance 125cc two-stroke sportbike of its era.
Target Audience:
Enthusiasts and mechanics seeking to maintain, repair, or restore the Cagiva Freccia 125 C10.
Competitors:
Yamaha TZR 125, Aprilia RS 125, Suzuki RG 125, Honda NSR 125.
Design:
Aggressive, aerodynamic styling characteristic of Cagiva's sportbike lineage, featuring faired bodywork.
Performance Orientation:
Engineered for sporty riding with a focus on handling and responsive power delivery.
Engine:
Complete engine disassembly, assembly, and tuning procedures for the 125cc two-stroke engine, including carburetor settings, ignition system, and cooling.
Transmission:
Detailed procedures for gearbox maintenance, clutch service, and shift mechanism adjustments.
Chassis:
Includes front fork (Marzocchi or similar), rear suspension (monoshock), swingarm, and steering head bearing maintenance and adjustment.
Brakes:
Front and rear brake system service, including caliper maintenance, brake line replacement, fluid bleeding, and pad inspection.
Electrical:
Comprehensive wiring diagrams, lighting system, charging system (stator, regulator/rectifier), ignition system, and instrument panel troubleshooting.
Fuel System:
Carburetor (likely Dell'Orto or Mikuni) overhaul, jetting, fuel tank maintenance, and fuel line routing.
Cooling System:
Radiator, fan, thermostat, and coolant flush procedures for the liquid-cooled engine.
Routine Maintenance:
Oil changes, spark plug replacement, air filter cleaning/replacement, chain adjustment, and general inspection guidelines.
Troubleshooting:
Diagnostic charts and symptom-based troubleshooting for common engine and electrical issues.
Engine Rebuild:
Detailed step-by-step instructions for engine disassembly, component inspection (piston, rings, cylinder), and reassembly with torque specifications.
Suspension Adjustment:
Front and rear suspension setup, including pre-load and damping adjustments where applicable.
Carburetor Tuning:
Idle speed adjustment, mixture screw settings, and jetting recommendations based on altitude and air conditions.
Depth:
Comprehensive coverage from basic rider maintenance to in-depth engine and electrical system overhauls, suitable for both novice and experienced mechanics.
Type:
Liquid-cooled, two-stroke, single-cylinder
Bore X Stroke:
56 mm x 50.6 mm (typical for this class)
Compression Ratio:
Approx. 7.5:1 - 8.0:1 (typical for the era)
Horsepower:
Approx. 28-32 HP at 10,500-11,500 RPM (stock, depending on market regulations)
Torque:
Approx. 18-20 Nm at 10,000 RPM (estimated)
Carburetor:
Single 30-32mm carburetor (e.g., Dell'Orto PHBH or Mikuni VM series).
Fuel Type:
Unleaded gasoline (RON 95 recommended), mixed with 2-stroke oil.
Ignition System:
Electronic ignition (CDI)
Lubrication Type:
Premix or Automatic Oil Injection (depending on specific C10 variant)
Engine Variant Codes:
Specific engine numbers should be checked in the manual for exact identification.
Crash Test Data:
N/A (Motorcycle, no standardized ratings like cars)
Braking System:
Front: Single disc brake, Rear: Disc brake. ABS was not common on 125cc bikes of this era.
Frame Construction:
Steel perimeter or trellis frame for rigidity.
Lighting:
Full fairing with integrated headlights and taillights, turn signals.
Instrument Panel:
Analog speedometer, tachometer, coolant temperature gauge, and warning lights.
Electronic Aids:
None standard (e.g., no ABS, traction control).
Oil Change Interval:
Every 3,000-5,000 km or annually, referring to the manual for specific oil type and grade.
Spark Plug Replacement:
Every 5,000-7,000 km, check manual for correct NGK/Denso type and heat range.
Chain Lubrication Adjustment:
Every 500-1,000 km or after riding in wet conditions.
Air Filter Service:
Every 3,000-6,000 km depending on riding environment; cleaning or replacement is crucial for performance.
Coolant:
Ethylene glycol based antifreeze mixture (50/50 with distilled water), specific type outlined in the manual.
Brake Fluid:
DOT 3 or DOT 4 brake fluid, refer to manual for exact specification and change interval.
Transmission Oil:
Gearbox oil specific to motorcycles, typically SAE 75W/90 or SAE 80W/90. Capacity approximately 1 liter.
2 Stroke Oil:
High-quality synthetic or semi-synthetic 2-stroke oil for premix or injection systems, adhering to JASO FD or higher standards. Check manual for Cagiva recommendations.
Carburetor Clogging:
Common in older carbureted bikes, requiring regular cleaning and ethanol-resistant fuel lines.
Power Valve Sticking:
The exhaust power valve can carbonize and seize, affecting engine performance; requires periodic cleaning and lubrication.
Electrical Connector Corrosion:
Age-related degradation of electrical connectors can lead to intermittent issues.
Cooling System Leaks:
Hose and gasket degradation can lead to coolant leaks.
Cagiva Legacy:
Cagiva, an Italian manufacturer, was known for its sporty motorcycles, often employing advanced two-stroke technology and distinctive styling.
Freccia Lineage:
The Freccia series represented Cagiva's entry into the competitive 125cc sportbike market, evolving from earlier models with improved aerodynamics and performance.
Production Period:
Mid to late 1980s, with the C10 being a significant iteration.
Manufacturing Origin:
Italy
