Segment:
High-performance dual-sport/supermoto motorcycles.
Competitors 2007:
KTM EXC, Husqvarna SM, Ducati Hypermotard (in spirit, though different execution).
Aprilia Philosophy:
Aprilia's reputation for innovative engineering, powerful engines, and race-bred chassis design.
Utility:
Essential for owners and technicians to maintain peak performance, diagnose issues, and perform repairs on these specialized machines.
Engine Service:
Detailed procedures for engine disassembly, inspection, repair, and reassembly, including valve clearance adjustment, timing chain inspection, piston and cylinder analysis.
Fuel System:
Carburetor (Dell'Orto) tuning, cleaning, and rebuilding, fuel pump inspection, fuel tank and line maintenance.
Ignition System:
Ignition coil testing, spark plug specifications, CDI unit diagnosis, troubleshooting ignition faults.
Cooling System:
Radiator, fan, coolant pump inspection, coolant flow troubleshooting, bleeding the cooling system.
Exhaust System:
Exhaust pipe and muffler inspection, gasket replacement, troubleshooting exhaust leaks.
Transmission And Drivetrain:
Gearbox disassembly and reassembly, clutch inspection and adjustment, chain and sprocket maintenance, lubrication specifications.
Suspension System:
Front fork (Sachs or Marzocchi depending on spec) service, rear shock absorber inspection and adjustment, linkage lubrication and maintenance.
Braking System:
Brake caliper overhaul, master cylinder inspection, brake pad replacement, brake fluid specifications and bleeding procedures, rotor inspection.
Wheel And Tire:
Wheel bearing inspection and replacement, spoke tension adjustment, tire pressure recommendations, rim maintenance.
Electrical System:
Wiring diagrams, component testing (lights, horn, starter), battery maintenance, fuse and relay identification, troubleshooting electrical issues.
Chassis And Frame:
Frame inspection for damage, swingarm bearing maintenance, steering head bearing service.
Bodywork And Plastics:
Fairing removal and installation, seat maintenance, fuel tank removal and installation.
Troubleshooting Guide:
Comprehensive diagnostic procedures for common and uncommon faults, organized by system and symptom.
Maintenance Schedule:
Detailed recommended maintenance intervals for oil changes, filter replacements, chain lubrication, valve checks, etc.
Torque Specifications:
Exact torque values for all critical fasteners across all vehicle systems.
Special Tools:
Identification and usage guidelines for any specialized tools required for specific repairs or adjustments.
Depth Level:
Factory-level diagnostic and repair procedures, suitable for professional technicians and experienced DIY mechanics.
Engine Type:
V-twin, four-stroke
Displacement 450:
449cc (approximate)
Displacement 550:
549cc (approximate)
Bore X Stroke 450:
70mm x 58mm (typical for this engine architecture)
Bore X Stroke 550:
78mm x 58mm (typical for this engine architecture)
Compression Ratio:
Approx. 12.5:1 (typical)
Valvetrain:
SOHC, 4 valves per cylinder (desmodromic actuation is NOT a feature of this Aprilia engine, contrary to some Ducati designs)
Horsepower 450:
Approx. 55-60 HP (claimed)
Horsepower 550:
Approx. 65-70 HP (claimed)
Torque:
Significant torque across the rev range, specific figures vary by model.
Carburetor Type:
Dell'Orto PHM 41 (or similar size, specific model may vary)
Fuel Type:
Unleaded gasoline, minimum 95 octane RON recommended.
Oil Type:
High-quality synthetic motorcycle oil, SAE 10W-40 or 15W-50 (refer to manual for precise specification).
Safety Certification:
ECE/DOT approved lighting and safety components for road legality (where applicable).
Braking System Type:
Hydraulic disc brakes front and rear.
Brake Discs Front:
Dual 320mm discs with radial calipers (typically Brembo or equivalent).
Brake Discs Rear:
Single 240mm disc with single-piston caliper.
Lighting:
Headlight, taillight, brake lights, turn signals (as per road-legal specifications).
Instrumentation:
Digital speedometer, tachometer, trip meters, warning lights.
Oil Change Interval:
Typically every 3,000-5,000 km or annually, refer to manual for precise recommendation and oil type.
Valve Clearance Check:
Recommended every 6,000-10,000 km or as specified in manual.
Chain Lubrication:
Frequent lubrication recommended, every 500-800 km and after washing or riding in wet conditions.
Coolant:
Ethylene glycol-based antifreeze mixture, typically 50/50 with distilled water.
Brake Fluid:
DOT 4 or DOT 5.1 (confirm with manual for specific requirements and replacement intervals).
Engine Vibrations:
High-performance V-twins can experience significant vibrations; proper maintenance is key.
Carburetor Tuning:
Dell'Orto carburetors can require meticulous tuning and occasional cleaning for optimal performance.
Electrical Connections:
Ensure all electrical connectors are clean and secure, especially in off-road environments.
Suspension Seals:
Regular inspection and maintenance of fork and shock seals are crucial for longevity.
Market Reception:
Highly acclaimed by enthusiasts for its aggressive styling, potent V-twin engine, and exceptional handling in the supermoto category.
Motorcycle Journal Reviews:
Consistently received high praise for performance and rider engagement in contemporary motorcycle reviews.
Emissions Standards:
Compliant with Euro 3 emissions standards for the European market.
