Market Segment:
High-performance lightweight sportbike, popular in the supersport segment for younger riders and track day enthusiasts.
Competitors 2006-2008:
Yamaha YZF-R125 (later models), Cagiva Mito 125, Honda CBR125R, Suzuki GSX-R125 (later models), Kawasaki Ninja 125 (later models).
Performance Focus:
Engineered for spirited riding with a focus on agility, handling, and track-day capability, often featuring a potent two-stroke engine.
Design Aesthetics:
Aggressive, race-inspired styling mirroring Aprilia's larger sportbikes, with a sharp fairing and sporty rider ergonomics.
Engine:
Detailed engine overhaul, including disassembly, assembly, tuning, and troubleshooting for the Rotax 122 engine variant.
Fuel System:
Carburetor (likely Dell'Orto PHBH or similar), fuel tank, fuel pump, and lines inspection and repair.
Ignition System:
CDI ignition system, spark plug, ignition coil, and wiring harness diagnostics and replacement.
Exhaust System:
Expansion chamber, silencer, and associated fittings inspection and maintenance.
Cooling System:
Liquid cooling system, radiator, water pump, hoses, and thermostat inspection and maintenance.
Transmission:
Six-speed gearbox, clutch assembly (likely wet multi-plate), shifting mechanism, and final drive maintenance and repair.
Chassis:
Aluminum twin-spar frame, subframe, and steering head maintenance.
Suspension Front:
Upside-down telescopic front forks (e.g., Marzocchi or Paioli), including fork oil change, seal replacement, and damping adjustments.
Suspension Rear:
Monoshock rear suspension system, including linkage, shock absorber servicing, and adjustment.
Brakes Front:
Front brake system, including caliper, master cylinder, brake lines, and disc inspection, service, and replacement.
Brakes Rear:
Rear brake system, including caliper, master cylinder, brake lines, and disc inspection, service, and replacement.
Wheels Tires:
Wheel bearing inspection and replacement, tire pressure checks, and tire replacement guidelines.
Electrical System:
Lighting system (headlight, taillight, indicators), battery maintenance, charging system (stator, rectifier), and wiring harness diagrams.
Bodywork:
Fairing, seat, fuel tank, and other body panels removal, installation, and minor repair guidance.
Preventive Maintenance:
Regular maintenance checks, lubrication schedules, and fluid level checks.
Troubleshooting:
Systematic diagnostic procedures for common problems and their solutions.
Disassembly Assembly:
Step-by-step instructions for removing and reinstalling all major components.
Adjustments:
Carburetor synchronization, clutch adjustment, brake lever adjustment, and suspension preload adjustments.
Rebuilding:
Detailed procedures for engine and gearbox rebuilds, including specific tolerances and specifications.
Torquing Procedures:
Crucial torque specifications for all critical fasteners to ensure proper assembly and safety.
Depth:
Comprehensive from basic maintenance to complete engine rebuilds and advanced troubleshooting.
Engine Type:
Liquid-cooled, two-stroke, single-cylinder (Rotax 122 family, likely with RAVE exhaust power valve).
Displacement:
124.8 cc (approx.)
Bore X Stroke:
Typically 54 mm x 54.5 mm (subject to slight variations).
Compression Ratio:
Approximately 12.0:1 (subject to tuning).
Horsepower Output:
Often in the range of 30-33 HP at the crank, depending on market and emissions regulations.
Torque Output:
Around 20-22 Nm (15-16 lb-ft) at peak RPM.
Carburetor Type:
Dell'Orto PHBH 28 or similar high-performance carburetor.
Fuel Delivery:
Premix (oil mixed with gasoline) or separate oil injection system (depending on specific model variant).
Fuel Type:
Unleaded gasoline, minimum 95 RON recommended.
Oil Change Interval:
Manual specifies regular checks and changes for the gearbox oil, typically every 5,000-10,000 km, or as per periodic maintenance schedule.
Spark Plug Replacement:
Recommended replacement interval varies, but typically around 5,000-8,000 km, with specific plug types detailed.
Fork Oil Change:
Recommended annually or every 10,000 km for optimal suspension performance.
Gearbox Oil:
Manual specifies SAE 75W/90 or SAE 80W/90 GL-4 gear oil. Specific Aprilia part numbers may be provided.
Coolant:
Ethylene glycol-based coolant with corrosion inhibitors, mixed 50/50 with distilled water. Manual will specify recommended coolant type and capacity.
Brake Fluid:
DOT 4 brake fluid is standard. Manual will specify replacement intervals and bleeding procedures.
Common Wear Items:
Clutch plates, piston rings, exhaust power valve (RAVE system) carbon buildup, and fork seals are common wear items.
Engine Care:
Proper premixing of oil and fuel, regular cleaning of the RAVE valve, and timely top-end rebuilds are crucial for engine longevity.
