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Introduction
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Market Position
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Positioning:
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The Aprilia Pegaso 650 was positioned as a versatile dual-sport or adventure touring motorcycle, bridging the gap between on-road comfort and off-road capability. It appealed to riders seeking a capable machine for commuting, light off-roading, and touring.
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Competitive Analysis
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Competitors:
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Competitors in this segment included models like the BMW F650 Funduro, Honda Transalp, Kawasaki KLR650, and Suzuki DR650SE.
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Key Features
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Key Features:
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Single-cylinder engine, comfortable riding position, long-travel suspension, relatively lightweight for its class, practical for everyday use and touring.
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Manual Coverage
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Systems Covered
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Engine:
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Complete overhaul, top-end, bottom-end, cooling system, lubrication system, fuel injection system, ignition system, emissions control.
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Transmission:
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Clutch operation, gearshift mechanism, gearbox disassembly and assembly, lubrication.
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Chassis:
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Frame inspection, front suspension (forks, steering head bearings), rear suspension (shock absorber, linkage, swingarm), wheel bearings, brake system (front and rear calipers, master cylinders, lines, pads, rotors), wheel and tire specifications.
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Electrical:
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Wiring diagrams, battery, charging system (alternator, regulator/rectifier), starter motor, lighting system, instrument panel, ECU (Engine Control Unit) diagnostics, sensor identification and testing.
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Bodywork:
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Panel removal and installation, fairings, seat, fuel tank, fenders, accessory mounting.
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Procedures Included
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Maintenance:
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Scheduled maintenance intervals, oil changes, filter replacements, chain adjustment, brake pad replacement, fluid flushes, spark plug replacement, air filter cleaning/replacement.
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Troubleshooting:
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Diagnostic flowcharts for common starting, running, electrical, and braking issues. Symptom-based problem diagnosis.
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Repair:
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Step-by-step instructions for component removal, overhaul, and reinstallation. Torque specifications for critical fasteners.
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Technical Specifications:
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Detailed specifications for all major components, including tolerances, clearances, and fluid capacities.
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Technical Depth
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Depth:
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Comprehensive. Covers everything from basic maintenance to complete engine and transmission rebuilds, including electrical system diagnostics and repair.
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Engine Specifications
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Primary Engine
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Engine Type:
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4-stroke, single-cylinder, liquid-cooled, DOHC
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Displacement:
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652 cc (approx. 39.8 cu in)
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Bore X Stroke:
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100 mm x 82 mm (approx.)
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Compression Ratio:
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9.5:1 (approx.)
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Performance
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Horsepower:
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Approx. 48-50 HP @ 6,500-7,000 RPM (varies slightly by market/tuning)
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Torque:
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Approx. 55-60 Nm @ 5,000-5,500 RPM (varies slightly by market/tuning)
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Fuel System
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Fuel Delivery:
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Carburetor (likely Mikuni BSR32 or similar) or early electronic fuel injection depending on specific market variant.
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Fuel Type:
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Unleaded gasoline
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Fuel Capacity:
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Approx. 22 Liters (5.8 US Gallons)
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Maintenance
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Service Intervals
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Oil Change Interval:
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Typically every 5,000-7,500 km or 6 months, whichever comes first (refer to manual for exact spec).
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Chain Adjustment Interval:
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Check every 1,000 km or as needed, adjust as per manual specification.
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Spark Plug Replacement:
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Typically every 10,000-15,000 km.
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Valve Clearance Check:
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Typically every 10,000-20,000 km, depending on engine wear and manufacturer recommendations.
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Fluid Specifications
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Engine Oil Type:
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10W-40 or 15W-50 Synthetic or Semi-Synthetic motorcycle-specific oil meeting API SG or higher and JASO MA standards.
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Engine Oil Capacity:
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Approx. 2.0 - 2.5 Liters (with filter change, check dipstick/sight glass).
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Coolant Type:
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Ethylene glycol-based antifreeze with corrosion inhibitors, typically a 50/50 mix with distilled water.
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Brake Fluid Type:
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DOT 4
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Chain Lube:
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High-quality motorcycle chain lubricant, applied regularly.
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Known Issues
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Common Wear Items:
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Clutch plates, chain and sprockets, front fork seals, swingarm bearings, wheel bearings, regulator/rectifier.
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Electrical Concerns:
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Some models may experience issues with the regulator/rectifier or stator. Wiring harness integrity should be checked.
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Engine Performance:
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Carburetor tuning can be critical for optimal performance. Check for vacuum leaks or clogged jets if performance is poor.
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Suspension:
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Front fork oil and seals may require periodic replacement. Rear shock absorber can lose damping effectiveness over time.
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