Target User:
Professional motorcycle technicians, dealership service departments, experienced DIY mechanics.
Value Proposition:
Provides the same authoritative and detailed information used by factory-trained technicians, enabling accurate and efficient maintenance and repair.
Comparison To Owner Manuals:
Significantly more in-depth than an owner's manual, offering technical specifications, diagnostic procedures, and repair instructions not found in basic user guides.
Diagrams Illustrations:
Extensive use of detailed diagrams, exploded views, and schematics to illustrate component layout and assembly sequences.
Technical Data Emphasis:
Focus on precise torque specifications, fluid capacities, tolerances, and electrical resistance values critical for accurate servicing.
Engine Systems:
Engine assembly, disassembly, tuning, diagnostics, fuel injection system, ignition system, lubrication system, cooling system, exhaust system.
Transmission Drivetrain:
Automatic transmission (CVT), final drive, clutch operation, variator, belt drive system.
Chassis Frame:
Frame structure, sub-frame, steering system, front suspension (forks), rear suspension (shock absorber, swingarm).
Braking System:
Front brake system (discs, calipers, master cylinder, hoses), rear brake system (disc, caliper, master cylinder, hoses), hydraulic system maintenance, bleeding procedures, brake pad replacement.
Electrical System:
Battery, starter motor, alternator, lighting system (headlights, taillights, turn signals), wiring diagrams, fuse box, instrument cluster, sensors, ECU diagnostics.
Fuel System:
Fuel tank, fuel pump, fuel filter, fuel injection (EFI) components, throttle body, injectors.
Cooling System:
Radiator, coolant, water pump, thermostat, hoses, fan.
Bodywork Cosmetics:
Fairings, body panels, seat removal, storage compartments, lighting fixture replacement.
Routine Maintenance:
Oil change, filter replacement (oil, air), spark plug inspection/replacement, drive belt inspection/replacement, coolant flush, brake fluid change, tire pressure checks.
Troubleshooting:
Step-by-step diagnostic procedures for common issues, fault code interpretation, electrical system troubleshooting, engine performance problems.
Repair Rebuild:
Complete engine rebuild procedures, transmission overhaul, suspension component replacement, brake system overhauls, electrical component repair/replacement.
Inspections:
Pre-ride inspection checklist, detailed component inspection guidelines (e.g., brake pad wear, tire tread depth, suspension linkage).
Depth Level:
Comprehensive: Covers everything from basic owner maintenance to full engine and component rebuilds, including detailed diagnostics and wiring diagrams.
Engine Type:
Single-cylinder, 4-stroke, liquid-cooled, SOHC (Single Overhead Camshaft)
Displacement:
278 cc (Cubic Centimeters)
Bore X Stroke:
75 mm x 63 mm (typical for this engine family)
Compression Ratio:
11.0:1 (typical)
Horsepower:
Approximately 22-24 HP (Horsepower) at stated RPM (specific value to be confirmed in manual)
Torque:
Approximately 23-25 Nm (Newton-meters) at stated RPM (specific value to be confirmed in manual)
Fuel Delivery:
Electronic Fuel Injection (EFI), Single throttle body
Fuel Type:
Unleaded gasoline (RON 95 recommended)
Ignition Type:
Electronic ignition, controlled by ECU
Oil Type:
API SG or higher, JASO MA certified 4-stroke motorcycle oil (e.g., 10W-40 or 15W-50, refer to manual for exact spec)
Coolant Type:
Ethylene glycol-based coolant (50% mixture with distilled water) for freeze protection and corrosion inhibition.
Length:
Approx. 2150 mm (refer to manual for exact dimension)
Width:
Approx. 780 mm (refer to manual for exact dimension)
Height:
Approx. 1400 mm (refer to manual for exact dimension)
Wheelbase:
Approx. 1535 mm (refer to manual for exact dimension)
Dry Weight:
Approx. 170-180 kg (refer to manual for exact specification)
Fuel Capacity:
Approx. 12-13 Liters (refer to manual for exact capacity)
Safety Standards Compliance:
Euro 3 emissions standards (E3 designation)
Braking System Type:
Combined Braking System (CBS) or independent front/rear brakes, typically with disc brakes front and rear.
Front Brakes:
Dual disc brakes with multi-piston calipers (e.g., 2-piston or 4-piston)
Rear Brakes:
Single disc brake with multi-piston caliper
Lighting:
Halogen headlight, LED taillight and turn signals (typical for the era)
Instrumentation:
Digital/analog combination instrument cluster providing speed, RPM, fuel level, engine temperature, warning lights.
Instrument Panel:
Features a comprehensive digital and analog display for speed, engine revs, fuel level, coolant temperature, odometer, trip meters, and warning indicators.
ABS:
ABS (Anti-lock Braking System) may have been an optional feature for certain markets or specific model variants of the Nexus 300 IE E3. Confirmation required in the manual.
Diagnostic Port:
OBD-II or proprietary diagnostic connector for engine management system (ECU) interrogation and data logging, crucial for technicians.
Oil Change Interval:
Typically every 5,000 km or 6 months (refer to manual for precise interval and conditions).
Air Filter Replacement:
Inspect every 5,000 km, replace as needed (typically around 10,000-15,000 km depending on conditions).
Spark Plug Replacement:
Inspect every 10,000 km, replace as needed (refer to manual for exact plug type and gap).
Drive Belt Inspection:
Inspect every 10,000 km, replace as needed (typically around 20,000-30,000 km).
Brake Fluid Change:
Every 2 years or as recommended by manual, regardless of mileage.
Engine Oil Capacity:
Approx. 1.5 - 1.7 Liters (with filter change, refer to manual for exact capacity).
Coolant Capacity:
Approx. 1.0 - 1.2 Liters (refer to manual for exact capacity).
Common Wear Items:
Drive belt, variator rollers, shock absorbers, front fork seals, brake pads, exhaust system components.
Potential Electrical Issues:
Corrosion in connectors, issues with stator or rectifier (common in older scooters if not maintained).
Manufacturer:
Gilera is an Italian motorcycle manufacturer with a long history dating back to 1909. It has a strong heritage in racing and performance-oriented scooters and motorcycles.
Nexus Lineage:
The Nexus model line represented Gilera's entry into the premium maxi-scooter segment, known for sporty handling and performance. The 300 IE E3 is an evolution of earlier Nexus models, incorporating fuel injection and meeting stricter emissions standards.
Production Era:
The Gilera Nexus line was produced roughly from the early 2000s through the mid-2010s, with the 300cc variant being a significant model within that range.
