Segment:
        
        
            Sport scooter / Maxi-scooter
        
     
    
        
            Target Audience:
        
        
            Owners and mechanics seeking comprehensive repair and maintenance data for the Gilera Nexus 300.
        
     
    
    
        
            Key Competitors Era:
        
        
            Suzuki Burgman 400, Yamaha TMAX 500 (larger displacement but comparable segment), Aprilia Atlantic 250/300, Piaggio X8/X9.
        
     
    
    
        
            Performance Orientation:
        
        
            Designed as a sporty and capable maxi-scooter with a focus on performance and comfortable touring.
        
     
    
    
        
            Completeness:
        
        
            Comprehensive factory service repair workshop manual, offering complete coverage.
        
     
    
        
            Accessibility:
        
        
            Instant digital download for immediate use.
        
     
 
    
    
    
        
            Engine Mechanical:
        
        
            Complete engine overhaul, disassembly, assembly, component inspection and replacement (e.g., piston, rings, crankshaft, camshaft, valves).
        
     
    
        
            Engine Fuel System:
        
        
            Fuel injection system (throttle body, injectors, fuel pump, pressure regulator), fuel filter replacement, fuel system diagnostics.
        
     
    
        
            Engine Ignition System:
        
        
            Spark plug replacement, ignition coil testing, CDI unit troubleshooting.
        
     
    
        
            Cooling System:
        
        
            Radiator, fan, coolant hoses, water pump, thermostat replacement and testing, coolant flush and refill procedures.
        
     
    
        
            Exhaust System:
        
        
            Catalytic converter information, muffler and pipe inspection and replacement.
        
     
    
        
            Transmission System:
        
        
            Automatic transmission operation, clutch system inspection and adjustment, CVT belt inspection and replacement, gearbox oil change and level check.
        
     
    
        
            Braking System:
        
        
            Front and rear brake caliper service, brake pad replacement, brake fluid flush and bleed, brake line inspection.
        
     
    
        
            Suspension System:
        
        
            Front fork overhaul, rear shock absorber replacement, linkage maintenance.
        
     
    
        
            Steering System:
        
        
            Handlebar inspection, steering head bearing maintenance and adjustment.
        
     
    
        
            Electrical System:
        
        
            Battery testing and replacement, charging system (stator, regulator/rectifier), starter motor, lighting system troubleshooting, wiring diagrams, fuse box layout and identification.
        
     
    
        
            Bodywork And Chassis:
        
        
            Panel removal and installation, seat adjustment, fairing component repair, chassis inspection.
        
     
    
    
        
            Scheduled Maintenance:
        
        
            Detailed service intervals for oil changes, filter replacements, spark plugs, valve clearance checks, brake fluid, coolant, and transmission fluid.
        
     
    
        
            Troubleshooting Guides:
        
        
            Diagnostic procedures for common starting issues, engine performance problems, electrical faults, and braking system irregularities.
        
     
    
        
            Repair Procedures:
        
        
            Step-by-step instructions for a wide range of repairs, from simple component replacements to complex engine and transmission rebuilds.
        
     
    
        
            Torque Specifications:
        
        
            Crucial torque values for engine components, fasteners, suspension parts, and bodywork.
        
     
    
        
            Wiring Diagrams:
        
        
            Comprehensive electrical wiring schematics for easy identification and troubleshooting of electrical circuits.
        
     
    
    
        
            Depth Of Coverage:
        
        
            Full factory-level repair and maintenance information, suitable for both amateur mechanics and professional technicians.
        
     
    
        
            Diagnostic Capabilities:
        
        
            Inclusion of diagnostic fault codes (DTCs) and procedures for interpreting and resolving them, particularly for the I.E. (Injection) system.
        
     
 
    
    
    
        
            Engine Type:
        
        
            Single-cylinder, four-stroke
        
     
    
        
            Displacement:
        
        
            278 cc (approximate, based on Nexus 300 models)
        
     
    
        
            Bore X Stroke:
        
        
            75 mm x 63 mm (typical for this engine family)
        
     
    
        
            Valvetrain:
        
        
            SOHC, 4 valves
        
     
    
        
            Cooling System Type:
        
        
            Liquid-cooled
        
     
    
        
            Emission Compliance:
        
        
            Euro 3 (E3)
        
     
    
    
        
            Horsepower Output:
        
        
            Approx. 22-23 HP (at 7,500 rpm)
        
     
    
        
            Torque Output:
        
        
            Approx. 23-24 Nm (at 6,000 rpm)
        
     
    
    
        
            Fuel Delivery:
        
        
            Electronic Fuel Injection (I.E.)
        
     
    
        
            Fuel Type:
        
        
            Unleaded gasoline (RON 95 recommended)
        
     
 
    
    
    
        
            Dashboard Display:
        
        
            Digital and analog display with speedometer, tachometer, fuel gauge, odometer, trip meter, coolant temperature, and warning lights.
        
     
    
    
        
            ABS:
        
        
            Available as an option on some versions, enhancing braking safety.
        
     
    
    
        
            Diagnostic Interface:
        
        
            On-board diagnostics (OBD) port for electronic system analysis, crucial for I.E. systems.
        
     
 
    
    
    
        
            Engine Oil Change:
        
        
            Every 5,000-7,500 km or annually, whichever comes first (refer to manual for precise interval).
        
     
    
        
            Oil Filter Replacement:
        
        
            At every engine oil change.
        
     
    
        
            Spark Plug Replacement:
        
        
            Every 10,000-15,000 km.
        
     
    
        
            Air Filter Cleaning Replacement:
        
        
            Inspect every 5,000 km, replace as needed.
        
     
    
        
            Coolant Replacement:
        
        
            Every 2 years or 20,000 km.
        
     
    
        
            Transmission Oil Change:
        
        
            Every 10,000-15,000 km.
        
     
    
    
        
            Engine Oil Type:
        
        
            Fully synthetic 10W-40 API SL/SM or JASO MA/MA2 (check manual for exact spec).
        
     
    
        
            Engine Oil Capacity:
        
        
            Approx. 1.6-1.8 liters (including filter).
        
     
    
        
            Coolant Type:
        
        
            Ethylene glycol-based coolant with anti-corrosion additives (e.g., Piaggio Coolant).
        
     
    
    
    
        
            Common Wear Items:
        
        
            CVT belt, brake pads, front fork seals, battery.
        
     
    
        
            Potential Electrical Gremlins:
        
        
            Some older models might experience minor electrical connection issues; the manual's wiring diagrams are crucial.
        
     
 
    
    
    
        
            Manufacturer:
        
        
            Gilera is an Italian motorcycle manufacturer with a long history, now part of the Piaggio Group.
        
     
    
    
        
            Nexus Lineage:
        
        
            The Nexus line represented Gilera's push into the maxi-scooter market, emphasizing sporty handling and performance.
        
     
    
        
            Development Context:
        
        
            Developed to compete with established European and Japanese maxi-scooters, offering a blend of Italian design and performance.
        
     
    
    
        
            Production Period:
        
        
            The Nexus 300 model was produced from around 2008 onwards, with updates for emissions compliance.