Engine:
Comprehensive coverage of the 650cc single-cylinder engine, including disassembly, assembly, inspection, and torque specifications.
Fuel System:
Detailed information on the electronic fuel injection (IE) system, including sensors, actuators, ECU diagnostics, fuel pump, injectors, and pressure regulation.
Ignition System:
Spark plug replacement, coil diagnosis, and ignition timing procedures.
Cooling System:
Radiator, cooling fan, thermostat, water pump, and coolant specifications and replacement procedures.
Exhaust System:
Catalytic converter, muffler, and exhaust pipe inspection and replacement.
Transmission:
5-speed gearbox, clutch operation, lubrication, and common wear points.
Drivetrain:
Chain drive system, sprocket inspection and replacement, and lubrication recommendations.
Brakes:
Front and rear disc brake systems, hydraulic lines, caliper overhaul, brake fluid specifications and bleeding procedures.
Suspension:
Front telescopic forks (likely Marzocchi or Paioli), rear monoshock absorber, adjustment procedures, oil replacement, and seal replacement.
Steering:
Handlebar, steering head bearings, inspection, lubrication, and adjustment.
Electrical System:
Battery, charging system (alternator/stator), starter motor, lighting circuits, wiring diagrams, fuse box layout, and common electrical faults.
Bodywork:
Fairing removal and installation, seat, fuel tank, and other body panels.
Frame:
Chassis inspection, welding integrity, and frame component identification.
Maintenance:
Scheduled maintenance, oil changes, filter replacements, chain adjustments, spark plug service, and fluid checks.
Troubleshooting:
Diagnostic procedures for common mechanical and electrical issues, fault codes, and symptom-based troubleshooting guides.
Repair:
Detailed step-by-step instructions for component removal, repair, and reassembly for all major systems.
Overhaul:
Complete engine, gearbox, and suspension component overhaul procedures.
Calibration:
Throttle body synchronization, idle speed adjustment, and ignition timing checks (where applicable).
Wiring Diagrams:
Comprehensive electrical schematics for all circuits, aiding in diagnosis and repair of electrical faults.
Torque Specifications:
Critical torque values for all fasteners and engine components to ensure proper assembly and prevent damage.
Depth:
Covers basic maintenance to complete engine and transmission rebuilds, suitable for professional technicians and experienced DIY mechanics.
Diagnostic Capability:
Includes diagnostic procedures for the EFI system, electrical faults, and mechanical issues.
Part Identification:
Illustrations and part names to identify components during disassembly and repair.
Engine Type:
4-stroke, single-cylinder, DOHC, 4 valves
Bore X Stroke:
100 mm x 83 mm (typical for Rotax 654 engine)
Compression Ratio:
Approx. 10.0:1 (varies slightly by sub-model)
Horsepower:
Approx. 48-50 HP @ 7000 rpm (claimed)
Torque:
Approx. 57 Nm @ 5500 rpm (claimed)
Fuel Delivery:
Electronic Fuel Injection (IE)
Fuel Type:
Unleaded gasoline (minimum 95 RON recommended)
Cooling Method:
Liquid-cooled
Oil Type:
SAE 10W-40, API SG or higher, JASO MA rated motorcycle oil. (Consult manual for specific Aprilia-approved oils).
Oil Capacity:
Approx. 2.1 - 2.3 liters (including filter, depending on model variant). (Consult manual for exact capacity).
Oil Change Interval:
Typically every 5,000 - 7,000 km or annually, whichever comes first. (Verify with manual).
Air Filter Service:
Inspect every 5,000 km, clean or replace as needed. (More frequent in dusty conditions).
Spark Plug Replacement:
Typically every 10,000 - 15,000 km. (Consult manual for specific plug type and gap).
Chain Adjustment:
Check and adjust every 1,000 - 2,000 km, or as slack increases.
Valve Clearance Check:
Typically at 10,000 km or 20,000 km intervals. (Crucial for engine longevity).
Coolant Type:
Ethylene glycol based, anti-freeze/anti-corrosion mixture. (Specific type detailed in manual).
Common Problems:
Potential issues include regulator/rectifier failure, starter solenoid issues, coolant leaks, and occasional fuel injection sensor problems. The single-cylinder engine can be prone to vibrations at certain RPMs.
Wear Items:
Chain and sprockets, brake pads, clutch plates, and fork seals are common wear items.