Engine:
Complete engine disassembly, assembly, rebuild, timing, lubrication, cooling system, fuel delivery (carburetor/injection), exhaust system diagnosis and repair.
Clutch:
Wet multi-plate clutch operation, maintenance, adjustment, and replacement procedures.
Transmission:
Gearbox inspection, repair, lubrication, shift mechanism, and associated components.
Fuel System:
Fuel tank, fuel pump, lines, fuel injectors (if applicable for 620), carburetor tuning and repair (if applicable for 400), and emission control systems.
Exhaust System:
Exhaust pipes, mufflers, catalytic converter (if equipped), and gasket replacement.
Ignition System:
Spark plugs, coils, ECU, timing, and related sensors.
Electrical System:
Battery, charging system (alternator, regulator/rectifier), starter motor, lighting, horn, instrumentation, and control modules.
Brakes:
Brake fluid, master cylinders, calipers, brake discs, pads, lines, levers, and pedal assembly.
Wheels Tires:
Wheel bearing inspection and replacement, tire pressure, tire wear, and wheel balancing.
Steering:
Handlebar assembly, steering head bearings, fork maintenance, and alignment.
Suspension:
Front forks (telescopic), rear shock absorber, linkages, and adjustment procedures.
Frame Bodywork:
Chassis inspection, fairings, seat, fuel tank, and structural components.
Wiring Diagrams:
Comprehensive electrical schematics for all systems, enabling precise diagnosis of electrical faults.
Maintenance:
Regular scheduled maintenance, oil changes, filter replacements, chain adjustment, brake fluid flushes, and general inspections.
Repair:
Detailed step-by-step instructions for all major and minor repairs across all covered systems, from component replacement to complete overhauls.
Troubleshooting:
Systematic diagnostic procedures for identifying and resolving common and uncommon faults, including fault codes and their meanings.
Specifications:
Torque values, clearances, fluid capacities, electrical resistance, and other critical technical data.
Disassembly Assembly:
Detailed guides for taking apart and reassembling individual components and entire systems.
Fault Finding:
Extensive fault-finding charts and diagnostic procedures for all major systems.
Depth:
Comprehensive, covering basic owner maintenance to professional-level workshop repairs and diagnostics.
Detail Level:
High level of detail with numerous high-quality pictures and diagrams for visual guidance.
Diagram Quality:
High-quality pictures and diagrams included throughout.
Engine Type:
L-Twin, Desmodromic 2-valve per cylinder, air-cooled (for 400) / liquid-cooled (for 620)
Displacement 400:
Approx. 398 cc
Displacement 620:
Approx. 618 cc
Power Output 620:
Typically around 63 HP (46 kW) at 9,500 rpm (exact figures may vary by specific model variant and market)
Torque 620:
Typically around 53 Nm (39 lb-ft) at 7,750 rpm (exact figures may vary by specific model variant and market)
Fuel Delivery 400:
Carburetor (likely Mikuni or similar, specific model TBC)
Fuel Delivery 620:
Electronic Fuel Injection (EFI) with single throttle body
Cooling 620:
Liquid-cooled (radiator and fan)
Valve Actuation:
Desmodromic valve control
Oil Change Interval:
Typically every 7,500 km or 12 months (refer to specific manual for exact intervals).
Desmo Service Interval:
Valve clearance checks and adjustment (Desmodromic service) typically at 10,000 km or 24,000 km intervals, depending on model year and specifics (critical maintenance item).
Engine Oil Type:
Fully synthetic SAE 15W-50 or 20W-50 motorcycle oil meeting API SG/SH/SJ or higher specifications.
Brake Fluid Type:
DOT 4 brake fluid (for both clutch and brake systems).
Coolant Type 620:
Ethylene glycol-based antifreeze with corrosion inhibitors, mixed with distilled water (typically 50/50 ratio).
Gearbox Oil Type:
SAE 75W/90 API GL-4 or GL-5 transmission oil (refer to manual for specific capacity and Ducati approval).
Common Wear Items:
Clutch plates, steering head bearings, wheel bearings, drive chain and sprockets, brake pads.
Electrical Gremlins:
Occasional issues with wiring connectors, regulator/rectifier, and battery charging system, often due to exposure and vibration.
Desmo Maintenance:
Neglecting Desmodromic valve service can lead to poor running, misfires, and potential engine damage. Regular inspection is crucial.