Vehicle Segment:
High-performance dual-sport/motocross motorcycles.
Target Audience:
Enthusiasts and owners of Aprilia SXV/RXV 450/550 motorcycles seeking to perform their own maintenance and repairs.
Direct Competitors Segment:
Other high-performance V-twin dual-sport/supermoto motorcycles from brands like KTM, Husqvarna, and occasionally Italian counterparts.
Engine Configuration:
Unique V-twin engine layout offering significant power and torque characteristics.
Chassis Design:
Lightweight and agile chassis optimized for aggressive riding and off-road or track use.
Performance Focus:
Designed for performance enthusiasts who prioritize power, handling, and riding experience.
Engine Mechanical:
Engine disassembly, assembly, component inspection, overhaul procedures for 450 and 550 V-twin engines.
Fuel System:
Fuel injection system (EFI), throttle body, fuel pump, injectors, fuel tank, fuel lines.
Ignition System:
Ignition coils, spark plugs, ECU (Engine Control Unit) diagnostics.
Cooling System:
Radiator, coolant hoses, water pump, thermostat, fan operation.
Exhaust System:
Exhaust headers, catalytic converter (if applicable), mufflers, sensor diagnostics.
Transmission Clutch:
Clutch operation, hydraulic system, gearbox disassembly and reassembly, gear selection mechanisms.
Suspension Front:
Front fork (upside-down) disassembly, service, oil changes, seal replacement, spring rates, damping adjustments.
Suspension Rear:
Monoshock rear suspension, linkage system, shock absorber service and adjustment, swingarm maintenance.
Braking System:
Front and rear disc brakes, hydraulic lines, master cylinders, calipers, brake pad replacement, bleeding procedures.
Electrical System:
Wiring diagrams, battery, charging system, lighting, starter motor, instrumentation, fuses, relays.
Frame Bodywork:
Frame inspection, body panel removal and installation, fairings, seat, fuel tank mounting.
Wheels Tires:
Wheel bearing inspection and replacement, tire fitting and balancing, spoke tensioning (if applicable).
Scheduled Maintenance:
Detailed maintenance schedules, oil change intervals, filter replacement, spark plug checks, valve clearance adjustments.
Troubleshooting:
Diagnostic flowcharts and procedures for common electrical and mechanical issues.
Engine Repair:
Complete engine rebuild procedures, piston and cylinder replacement, crankshaft and connecting rod service.
Transmission Repair:
Gearbox component replacement, shift drum and fork alignment, clutch assembly overhaul.
Suspension Service:
Front and rear suspension fork/shock absorber internal service, seal replacement, fluid replenishment.
Brake System Service:
Brake system bleeding, caliper overhaul, master cylinder replacement, pad and disc inspection.
Electrical Diagnostics:
Component testing, wiring continuity checks, fault code interpretation (if ECU accessible).
Torque Specifications:
Detailed torque values for all critical fasteners.
Depth Of Coverage:
Comprehensive, covering everything from routine maintenance to complete engine and chassis overhauls.
Diagnostic Capability:
Detailed troubleshooting guides for identifying and resolving mechanical, electrical, and fuel system issues.
Repair Instructions:
Step-by-step illustrated instructions for all repair and maintenance tasks.
Component Identification:
Clear identification of all parts and their functions.
Engine Type:
Four-stroke, V-twin, liquid-cooled
Bore Stroke 450:
Approx. 70mm x 58mm
Bore Stroke 550:
Approx. 78mm x 58mm
Compression Ratio:
Varies by model year, typically around 12.0:1 to 13.0:1
Valvetrain:
DOHC, 4 valves per cylinder
Horsepower 450:
Estimated 60+ HP (stock, variations exist)
Horsepower 550:
Estimated 65+ HP (stock, variations exist)
Torque 450:
Estimated 40+ lb-ft
Torque 550:
Estimated 45+ lb-ft
Fuel Delivery:
Electronic Fuel Injection (EFI)
Throttle Body:
Dual throttle bodies (one per cylinder, often Keihin or similar)
Fuel Type:
Unleaded gasoline, 91 octane or higher recommended
Engine Oil Capacity:
Approx. 1.8 - 2.2 liters (check manual for exact capacity)
Oil Change Interval:
Typically every 3,000-5,000 km or 6-12 months (refer to manual for specific interval based on usage).
Air Filter Cleaning:
Check and clean every 1,000-2,000 km, replace as needed.
Spark Plug Replacement:
Typically every 10,000-15,000 km.
Valve Clearance Adjustment:
First check at 10,000-15,000 km, then as per manual recommendations.
Engine Oil Specification:
Refer to manual for exact grade and API classification (e.g., Motul, Castrol motorcycle oils).
Coolant Specification:
Mixture of distilled water and ethylene glycol-based antifreeze (50/50 mix recommended).
Brake Fluid Specification:
DOT 4 or DOT 5.1 (verify in manual), high-performance synthetic brake fluid.
Common Wear Items:
Clutch plates, wheel bearings, fork seals, stator/regulator-rectifier, valve stem seals.
Engine Specifics:
V-twin engines can be sensitive to proper oil levels and maintenance; potential for oil leaks if not maintained correctly.
Electrical System:
Regulator/rectifier failures can occur, affecting battery charging. Wiring harness integrity should be checked.
