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.