Segment:
Dual-sport / Adventure motorcycle
Target Audience:
Owners and independent mechanics seeking to perform maintenance and repairs on the Aprilia Pegaso 650 (1997 model).
Competitors:
BMW F650 Funduro, Honda Transalp, Yamaha Ténéré
Vehicle Focus:
Versatile, reliable single-cylinder engine, capable on-road and light off-road.
Engine Mechanical:
Full engine disassembly, assembly, timing, valve clearance, piston, cylinder, crankshaft, connecting rods, oil pump, lubrication system
Engine Fuel System:
Carburetor tuning and overhaul (likely Dell'Orto PHM 40), fuel pump, fuel lines, fuel filter
Engine Ignition System:
Ignition timing, spark plugs, CDI unit, ignition coils, wiring
Transmission Drivetrain:
Clutch operation and adjustment, gearbox disassembly and assembly, gear ratios, final drive, chain and sprockets maintenance
Chassis Suspension:
Front fork (Marzocchi or similar) disassembly, seal replacement, oil levels, rear shock absorber adjustment and overhaul, swingarm bearings
Braking System:
Front and rear brake caliper maintenance, brake pad replacement, brake fluid flush and bleeding, master cylinder, brake lines
Electrical System:
Battery maintenance, charging system (alternator/stator, regulator/rectifier), starter motor, lighting system (headlight, taillight, indicators), wiring diagrams, fuse box, switches
Cooling System:
Radiator, coolant, fan operation, hoses, thermostat
Exhaust System:
Exhaust pipe and muffler maintenance, gasket replacement
Bodywork Frame:
Fairing removal and installation, seat, fuel tank, fenders, frame inspection
Preventive Maintenance:
Scheduled maintenance checks, oil changes, filter replacements, chain lubrication and adjustment, bolt torque checks
Diagnostic Troubleshooting:
Step-by-step guides for identifying and resolving common and uncommon issues
Repair Procedures:
Detailed instructions for replacing worn or damaged components
Overhaul Rebuild:
Complete engine and component overhaul instructions
Wiring Diagrams:
Comprehensive electrical schematics for all systems
Depth:
Expert-level: Covers complete engine rebuilds, advanced diagnostics, and detailed component-level repairs.
Detail Level:
Includes torque specifications, clearance measurements, special tool requirements, and part identification.
Engine Type:
Single-cylinder, four-stroke, liquid-cooled
Displacement:
652 cc (654 cc)
Bore X Stroke:
100 mm x 83 mm
Valve Train:
SOHC, 4 valves per cylinder
Horsepower:
Approx. 48 HP (36 kW) @ 6,750 rpm (Varies slightly by market)
Torque:
Approx. 5.6 kgm (55 Nm / 40.5 lb-ft) @ 5,000 rpm (Varies slightly by market)
Carburetor:
Dell'Orto PHM 40 CS (or similar variant)
Fuel Delivery:
Carburetor with accelerator pump
Fuel Type:
Unleaded gasoline (RON 91 or higher recommended)
Oil Type:
API SG or higher, JASO MA certified motorcycle oil, SAE 10W-40 or 15W-50 depending on temperature range
Coolant Type:
Ethylene glycol-based antifreeze mixture (50% water, 50% coolant)
Length:
Approx. 2,150 mm (84.6 in)
Width:
Approx. 860 mm (33.9 in) (at handlebars)
Height:
Approx. 1,300 mm (51.2 in) (at seat)
Wheelbase:
Approx. 1,460 mm (57.5 in)
Dry Weight:
Approx. 183 kg (403 lbs)
Wet Weight:
Approx. 202 kg (445 lbs) (with all fluids)
Gross Vehicle Weight Rating:
Not specified, but consider rider, passenger, and luggage loads.
Fuel Capacity:
21 Liters (5.5 US gallons)
Safety Certification:
CE (Conformité Européenne) standards applicable to motorcycles of this era.
Brakes Front:
Dual 298 mm discs, hydraulic, two-piston calipers (e.g., Brembo or Grimeca)
Brakes Rear:
250 mm disc, hydraulic, single-piston caliper
ABS:
Not standard on this model year.
Lighting:
Halogen headlight, LED taillight (possibly), front and rear turn signals
Instrumentation:
Analog speedometer, tachometer, fuel gauge, coolant temperature warning light, oil pressure warning light
Oil Change Interval:
Typically every 5,000 - 7,500 km (3,000 - 5,000 miles) or annually, whichever comes first.
Air Filter Replacement:
Inspect every 5,000 km, replace as needed or every 10,000 - 15,000 km.
Spark Plug Replacement:
Inspect every 5,000 km, replace every 10,000 - 15,000 km (check manual for specific plug type and gap).
Valve Clearance Check:
Typically every 10,000 - 15,000 km (crucial for single-cylinder engines).
Chain Maintenance:
Lubricate and adjust every 1,000 km or after riding in wet conditions.
Engine Oil Capacity:
Approx. 2.4 Liters (with filter change)
Fork Oil Type:
SAE 5W or 10W (check manual for specific viscosity and level)
Common Wear Items:
Clutch plates, chain and sprockets, fork seals, regulator/rectifier, stator windings.
Potential Electrical Issues:
Aging wiring harness, stator failure, regulator/rectifier failure can lead to charging problems.
Engine Maintenance Emphasis:
Regular valve clearance checks and proper carburetor tuning are vital for optimal performance and longevity.
Manufacturer:
Aprilia is an Italian manufacturer renowned for its sport motorcycles and scooters.
Pegaso Lineage:
The Pegaso line was Aprilia's entry into the dual-sport market, often utilizing reliable Rotax engines.
Generations:
The Pegaso 650 underwent several iterations, with the 1997 model representing a specific generation featuring the single-cylinder Rotax engine.
Production Years:
The Pegaso 650 was produced from the early 1990s through the mid-2000s, with variations in engine and styling.
Manufacturing Location:
Italy
