Era:
Late 1980s sportbike segment, competing with other 125cc two-stroke performance bikes.
Target Audience:
Young riders seeking accessible sportbike performance and styling.
Competitors:
Aprilia AF1 125, Yamaha TZR125, Suzuki RG125 Gamma, Honda NSR125.
Design:
Aggressive, fully faired sportbike styling influenced by larger sportbikes of the era.
Performance:
Emphasis on sporty handling and a lively two-stroke engine for its displacement class.
Engine Characteristics:
High-revving two-stroke engine, characteristic power band.
Engine:
Complete engine overhaul, top end (cylinder, piston, head), bottom end (crankshaft, connecting rod, bearings), lubrication, cooling system, exhaust system.
Fuel System:
Carburetor tuning, cleaning, and rebuilding; fuel tank, fuel lines, petcock.
Transmission:
Gearbox disassembly and reassembly, clutch operation and adjustment, shift mechanism.
Chassis:
Frame inspection and repair, swingarm, rear shock absorber, linkage.
Suspension:
Front fork service (oil change, seal replacement, spring replacement), rear shock absorber maintenance.
Brakes:
Front and rear brake system service (caliper maintenance, pad replacement, master cylinder service, brake fluid flush), hydraulic lines.
Electrical:
Ignition system (CDI, coil, spark plug), lighting system, battery maintenance, wiring diagrams, starter motor, charging system (alternator/stator).
Bodywork:
Fairing removal and installation, seat, fuel tank, fenders, controls, mirrors.
Maintenance:
Routine servicing, lubrication points, chain adjustment, filter replacements, spark plug checks, brake bleeding, coolant flushes.
Troubleshooting:
Diagnosis of common starting problems, running issues, electrical faults, brake system malfunctions, suspension behavior.
Repair:
Detailed step-by-step instructions for component removal, disassembly, inspection, repair, reassembly, and adjustment.
Specifications:
Torque values for critical fasteners, engine tolerances, fluid capacities, electrical resistance values, ignition timing settings.
Depth:
Comprehensive, covering from basic maintenance to full engine rebuilds and major component overhauls. Suitable for experienced home mechanics and professional technicians.
Bore X Stroke:
56 mm x 50.6 mm (typical for Rotax 127 derived engines)
Compression Ratio:
Approx. 7.5:1 (typical for unported 125cc 2-strokes)
Power Output:
Approx. 25-30 HP at 10,000-11,000 RPM (depending on market regulations and tuning)
Torque:
Approx. 18-20 Nm at 9,000-10,000 RPM
Top Speed:
Approx. 140-150 km/h (87-93 mph)
Carburetor Model:
Dell'Orto PHBH 28 AS (or similar 28mm unit)
Fuel Type:
Unleaded gasoline (min 95 RON), mixed with 2-stroke oil
Oil System:
Automatic oil injection system
Type:
Constant mesh, 6-speed sequential
Gear Ratios:
Specific ratios will be detailed in the manual (e.g., 1st gear ratio, final drive ratio).
Transmission Oil Type:
API GL-4 or GL-5, SAE 75W/90 (or as specified in manual)
Transmission Oil Capacity:
Approx. 0.6 - 0.8 liters (refer to manual for exact specification)
Safety Certification:
CE marking and relevant European/national homologation standards for motorcycles of the era.
Braking System:
Front: Disc brake (likely 260-280mm single disc with 2-piston caliper). Rear: Disc brake (likely 220-240mm single disc with 1-2 piston caliper).
Suspension Type:
Front: Telescopic forks (likely 35-38mm diameter). Rear: Monoshock swingarm.
Lighting:
Halogen headlight, taillight, turn signals.
Oil Change Transmission:
Every 6,000-10,000 km or annually (check manual for specifics)
Spark Plug Check Replace:
Check every 3,000 km, replace every 6,000-12,000 km (depending on plug type)
Air Filter Clean Replace:
Clean every 3,000 km, replace as needed or every 12,000 km
Chain Lubrication Adjustment:
Lubricate every 500-1000 km, adjust every 6,000 km
Fork Oil Change:
Every 12,000-20,000 km or as per manual recommendations.
Coolant Type:
Ethylene glycol based antifreeze, diluted 50/50 with distilled water.
Brake Fluid Type:
DOT 4 (refer to manual for specific DOT rating)
2 Stroke Oil Type:
High quality 2-stroke motorcycle oil, JASO FD or higher specification (refer to manual for specific brand/type recommendations).
Wear And Tear:
Typical 2-stroke wear on piston, rings, and cylinder due to high operating temperatures and revs. Carburetor jetting can be sensitive to altitude and temperature. Electrical connectors can corrode over time.
Common Faults:
Difficulty starting if fuel/air mixture is incorrect, power band flatness due to worn components or incorrect jetting, clutch slip if oil levels are low or plates are worn.
Manufacturer Origin:
Cagiva Motor S.p.A., Italy.
Brand Specialty:
Known for its sporty Italian motorcycles, often featuring innovative designs and two-stroke engines.
Predecessor:
Likely followed earlier Cagiva 125cc sportbikes.
Successor:
Evolved into models like the Freccia C12, Mito 125.
Manufacturing Location:
Italy
