Segment:
        
        
            Supermoto/Dual-Sport niche, high-performance off-road focused street-legal motorcycles.
        
     
    
        
            Target Audience:
        
        
            Enthusiast riders, DIY mechanics, performance-oriented owners seeking to maintain and repair their high-strung Aprilia machines.
        
     
    
    
        
            Key Competitors:
        
        
            KTM EXC-R series, Husqvarna SMR/TE series, Ducati Hypermotard (in spirit).
        
     
    
    
        
            Vehicle Identity:
        
        
            Aprilia's powerful V-twin engines in a lightweight, agile chassis designed for both track-day prowess and spirited street riding.
        
     
    
        
            Manual Value Proposition:
        
        
            Provides essential, factory-accurate technical data crucial for owners and technicians to properly maintain, diagnose, and repair these specialized Italian motorcycles.
        
     
 
    
    
    
        
            Engine Assembly:
        
        
            Detailed disassembly, inspection, repair, and reassembly procedures for both 450cc and 550cc V-twin engines.
        
     
    
        
            Fuel System:
        
        
            Fuel injection system diagnostics, component testing, fuel pump, injectors, throttle body, and ECU mapping information.
        
     
    
        
            Cooling System:
        
        
            Radiator, coolant passages, fan operation, thermostat, and troubleshooting for overheating issues.
        
     
    
        
            Ignition System:
        
        
            Spark plugs, ignition coils, CDI unit, timing, and related diagnostics.
        
     
    
        
            Exhaust System:
        
        
            Component inspection, gasket replacement, and structural integrity checks.
        
     
    
        
            Transmission And Drivetrain:
        
        
            Clutch operation, gearbox disassembly, gear inspection, shifting mechanism, chain and sprocket maintenance.
        
     
    
        
            Suspension Front:
        
        
            Fork seal replacement, oil changes, damper adjustments, stanchion inspection, and assembly.
        
     
    
        
            Suspension Rear:
        
        
            Shock absorber servicing, linkage lubrication, bearing checks, and rear spring preload adjustments.
        
     
    
        
            Braking System Front:
        
        
            Brake caliper overhaul, pad replacement, disc inspection, master cylinder servicing, and hydraulic line bleeding.
        
     
    
        
            Braking System Rear:
        
        
            Rear caliper servicing, pad and disc replacement, and brake fluid checks.
        
     
    
        
            Electrical System Wiring:
        
        
            Complete wiring diagrams, component location, circuit descriptions, troubleshooting for electrical faults.
        
     
    
        
            Lighting And Instruments:
        
        
            Headlight, taillight, turn signals, dashboard indicators, and instrument cluster diagnostics.
        
     
    
        
            Battery And Charging:
        
        
            Battery testing, charging system checks (stator, regulator/rectifier).
        
     
    
        
            Body Panels And Fairings:
        
        
            Removal, installation, and repair of all bodywork, including plastics and seat.
        
     
    
        
            Frame And Steering:
        
        
            Headstock bearing inspection and replacement, frame integrity checks.
        
     
    
    
        
            Routine Maintenance:
        
        
            Oil changes, filter replacements, chain adjustment, spark plug replacement, air filter cleaning/replacement.
        
     
    
        
            Engine Rebuild:
        
        
            Complete engine overhaul, piston replacement, ring installation, valve adjustments, cylinder head work.
        
     
    
        
            Suspension Tuning:
        
        
            Adjustments for different riding conditions, fork oil viscosity selection.
        
     
    
        
            Brake Bleeding:
        
        
            Step-by-step guide for proper brake fluid exchange and system bleeding.
        
     
    
        
            Electrical Troubleshooting:
        
        
            Systematic diagnostic procedures for identifying and resolving electrical issues.
        
     
    
        
            Torque Specifications:
        
        
            All critical fastener torque values for engine, chassis, and bodywork.
        
     
    
        
            Diagnostic Codes:
        
        
            Information on reading and interpreting diagnostic trouble codes (DTCs) if applicable to the 2011 model.
        
     
    
        
            Special Tool Requirements:
        
        
            Identification of necessary special tools for specific repair procedures.
        
     
    
        
            Troubleshooting Charts:
        
        
            Includes diagnostic flowcharts for common problems, symptoms, and potential causes.
        
     
    
    
        
            Depth:
        
        
            Comprehensive, covering everything from basic maintenance to full engine and gearbox rebuilds, including in-depth electrical diagnostics.
        
     
 
    
    
    
        
            Engine Type 450:
        
        
            V-twin, Four-stroke, Liquid-cooled
        
     
    
        
            Engine Type 550:
        
        
            V-twin, Four-stroke, Liquid-cooled
        
     
    
        
            Bore X Stroke 450:
        
        
            Approx. 72 mm x 55.2 mm (Specific figures to be confirmed in manual)
        
     
    
        
            Bore X Stroke 550:
        
        
            Approx. 78 mm x 55.2 mm (Specific figures to be confirmed in manual)
        
     
    
    
    
        
            Compression Ratio:
        
        
            Typically around 12.0:1 to 13.0:1 (Specific figures to be confirmed in manual)
        
     
    
    
        
            Horsepower 450:
        
        
            Approx. 65-70 HP (Specific figures to be confirmed in manual)
        
     
    
        
            Horsepower 550:
        
        
            Approx. 70-75 HP (Specific figures to be confirmed in manual)
        
     
    
        
            Torque 450:
        
        
            Approx. 45-50 Nm (Specific figures to be confirmed in manual)
        
     
    
        
            Torque 550:
        
        
            Approx. 50-55 Nm (Specific figures to be confirmed in manual)
        
     
    
    
        
            Fuel Delivery:
        
        
            Electronic Fuel Injection (EFI) with VCM (Vehicle Control Module)
        
     
    
        
            Fuel Type:
        
        
            Unleaded gasoline, minimum 95 RON (Premium)
        
     
 
    
    
    
        
            Oil Change Interval:
        
        
            Recommended every 3,000-5,000 km or annually (Specific interval detailed in manual)
        
     
    
        
            Valve Clearance Check:
        
        
            Recommended every 6,000-10,000 km (Specific interval detailed in manual)
        
     
    
        
            Chain Lubrication Cleaning:
        
        
            Frequent (every 500-1000 km) and after wet riding conditions (Detailed in manual)
        
     
    
    
        
            Engine Oil Type:
        
        
            Synthetic SAE 10W-40 or 15W-50 API SG/SH/SJ or higher (Specific specification in manual)
        
     
    
        
            Engine Oil Capacity:
        
        
            Approx. 1.6 - 1.8 Liters (Specific capacity in manual)
        
     
    
        
            Coolant Type:
        
        
            Ethylene glycol based coolant, 50% mixture with distilled water (Specific type in manual)
        
     
    
        
            Brake Fluid Type:
        
        
            DOT 4 hydraulic brake fluid (Specific type in manual)
        
     
    
        
            Fork Oil Type:
        
        
            Specific viscosity grade fork oil (e.g., 5W or 7.5W) (Detailed in manual)
        
     
    
    
        
            Common Wear Items:
        
        
            Clutch plates, brake pads, chain and sprockets, fork seals, voltage regulator.
        
     
    
        
            Potential Electrical Gremlins:
        
        
            Wiring harness issues or stator/regulator failures can occur with age and mileage, requiring detailed electrical troubleshooting found in the manual.