Segment:
Lightweight Adventure Touring / Supermoto
Target Audience:
Owners and independent mechanics seeking in-depth repair knowledge
Key Competitors:
BMW F650GS (single-cylinder), Honda Transalp (later models), Yamaha XT660R/X
Unique Selling Points:
Agile handling, strong single-cylinder torque, accessible for maintenance
Vehicle Philosophy:
Versatile motorcycle capable of commuting, touring, and light off-road use (Trail variant)
Manual Value Proposition:
Empowers owners to perform comprehensive maintenance and repairs, reducing reliance on dealerships
Engine System:
Complete engine overhaul, tuning, component replacement (cylinder head, piston, crankshaft, valve train)
Fuel System:
Carburetor (likely Mikuni BST40 for this generation) service, adjustment, jetting, fuel pump operation
Ignition System:
CDI ignition system diagnosis, component testing (coil, pickup coil, ECU)
Transmission System:
Clutch operation, gearbox disassembly and reassembly, gear selection, chain drive maintenance
Cooling System:
Radiator, fan, thermostat, coolant flush and fill, leak testing
Electrical System:
Wiring diagrams, battery, charging system (alternator, regulator/rectifier), lighting, starter motor, fuses, relays
Brake System:
Hydraulic system (front and rear disc brakes), caliper service, pad replacement, fluid bleeding, master cylinder overhaul
Suspension System:
Front fork (telescopic) service, seal replacement, oil level adjustment; rear monoshock absorber, linkage maintenance
Frame And Bodywork:
Chassis components, fairing removal and installation, seat, fuel tank, body panel repairs
Wheel And Tire System:
Wheel bearing replacement, spoke tension adjustment (for Trail model), tire mounting and balancing
Routine Maintenance:
Oil changes, filter replacements, spark plug service, chain lubrication and adjustment, brake inspection
Troubleshooting Guides:
Diagnostic flowcharts for common starting, running, and electrical issues
Repair Procedures:
Step-by-step instructions for engine rebuilds, transmission overhauls, suspension component replacement
Electrical Diagnostics:
Fault finding for charging system, ignition, lighting, and starter circuits
Carburetor Tuning:
Detailed guidance on setting idle speed, mixture, and jet changes for optimal performance
Chassis Alignment:
Steering head bearing adjustment, rear swingarm bearing inspection
Rebuilding Procedures:
Complete engine assembly, gearbox component replacement
Diagnostic Level:
Advanced diagnostics with component specifications and testing procedures
Repair Depth:
Full workshop repair covering all mechanical and electrical systems
Special Tools:
Identification of required special tools for specific procedures
Torque Specifications:
Precise torque values for all critical fasteners
Dimensional Data:
Clearances, tolerances, and measurements for worn parts
Diagrams And Illustrations:
Step-by-step diagrams and exploded views for assembly and disassembly
Engine Type:
4-stroke, Liquid-cooled, SOHC, Single Cylinder
Bore X Stroke:
100 mm x 84 mm (Approximate)
Compression Ratio:
9.7:1 (Typical for M659 engine)
Valve Train:
2 valves per cylinder, actuated by chain-driven camshaft
Horsepower:
Approximately 48-50 HP @ 6500 RPM
Torque:
Approximately 57 Nm (42 lb-ft) @ 5000 RPM
Carburetor:
Mikuni BST40 (39mm) Flat Slide (Typical)
Fuel Delivery:
Mechanical Fuel Pump (Diaphragm type)
Fuel Type:
Unleaded Gasoline (95 RON / 91 AKI recommended)
Oil Change Interval:
Every 5,000-7,500 km or annually (refer to manual for precise interval)
Air Filter Check:
Every 5,000 km or as needed based on riding conditions
Spark Plug Replacement:
Every 10,000-15,000 km (specific plug type dictates interval)
Chain Maintenance:
Lubricate and adjust chain every 1,000 km or after wet riding
Engine Oil Capacity:
Approx. 2.1 Liters (with filter change)
Coolant Type:
Ethylene glycol-based antifreeze (50% mixture with distilled water)
Brake Fluid Type:
DOT 4 (refer to manual for specific grade and change interval)
Common Wear Items:
Clutch plates, fork seals, wheel bearings, exhaust gasket
Potential Electrical Issues:
Regulator/rectifier failure, wiring harness degradation (age-related)
Carburetor Wear:
Diaphragm cracking or wear in the BST40 carburetor can lead to poor throttle response.
Aprilia Motorsport:
Aprilia has a rich history in motorcycle racing, particularly in Grand Prix, which influences their road-going models.
Pegaso Lineage:
The Pegaso line has evolved from earlier models, with the 650cc single-cylinder engine becoming a staple for this class of motorcycle.
Strada Vs Trail:
The Strada is typically oriented towards a more road-biased performance with alloy wheels, while the Trail features spoke wheels and potentially longer suspension travel for light off-road capability.
Original Production Years:
The Pegaso 650 was introduced in the early 1990s, with the Strada and Trail variants emerging later. This manual covers models from 1997 onwards, indicating the continuation and refinement of the single-cylinder platform.
