Description:
The KTM 990 Super Duke was a flagship naked sportbike, known for its aggressive styling, powerful V-twin engine, and exceptional handling. Positioned as a premium performance machine for discerning riders.
Competitors:
Competed against other high-performance naked bikes such as the Ducati Monster S4R, Triumph Speed Triple, and Aprilia Tuono V-Twin.
Engine Type:
LC8 V-twin engine, renowned for its character and torque.
Handling And Suspension:
High-quality WP suspension components and aggressive chassis geometry.
Braking System:
Premium Brembo braking components offering superior stopping power.
Engine:
Complete engine disassembly, inspection, repair, and reassembly for the 990cc V-twin LC8 engine. Includes valve train, piston, connecting rod, crankshaft, cylinder head, and oil pump procedures.
Fuel System:
Fuel injection system components (throttle bodies, injectors, fuel pump, pressure regulator), fuel tank, and lines. Includes diagnostic procedures and adjustment specifications.
Transmission:
Gearbox inspection, repair, and maintenance. Includes clutch operation, gearbox internals, and shifting mechanism.
Chassis And Suspension:
Front fork (WP USD) overhaul, adjustment, and seal replacement. Rear shock absorber (WP) maintenance and settings. Swingarm, linkage, and bearing checks.
Brakes:
Front and rear brake system components, including calipers (Brembo radial-mount), master cylinders, brake lines, pads, discs, and ABS system (if equipped). Bleeding procedures and specifications.
Electrical System:
Wiring diagrams, component testing (ignition, lighting, starting system, charging system), fuse box layout, battery maintenance, and dashboard information.
Cooling System:
Radiator, coolant hoses, water pump, thermostat, and fan operation. Coolant type and capacity specifications.
Exhaust System:
Catalytic converter (if applicable), mufflers, and exhaust pipe maintenance and inspection.
Bodywork And Frame:
Frame inspection, fairing removal and installation, seat, fuel tank, and body panel components.
Routine Maintenance:
Oil and filter change, air filter service, spark plug replacement, chain adjustment and lubrication, brake fluid flush, coolant flush.
Troubleshooting:
Diagnostic flowcharts for common issues related to engine performance, electrical faults, starting problems, and braking system anomalies.
Repair And Rebuild:
Detailed step-by-step instructions for engine internal rebuilds, suspension overhauls, brake system component replacement, and electrical system component repair.
Specifications And Tolerances:
Torque values for critical fasteners, valve clearances, piston ring gaps, bearing clearances, and fluid capacities. Includes engine tuning parameters.
Depth:
Comprehensive: Covers all aspects from basic maintenance to complete engine and component rebuilds. Includes detailed diagrams, exploded views, and diagnostic information.
Type:
Liquid-cooled, 4-stroke, 75° V-twin, DOHC, 4 valves per cylinder
Bore X Stroke:
101 mm x 62.4 mm
Compression Ratio:
12.5:1
Horsepower:
Approx. 114 hp (84 kW) @ 9,000 rpm (varies slightly by year and market)
Torque:
Approx. 71 lb-ft (96 Nm) @ 7,000 rpm (varies slightly by year and market)
Induction:
Electronic fuel injection (throttle bodies by Keihin or Mikuni depending on year)
Fuel Type:
Unleaded premium gasoline (min. 95 RON)
Dashboard:
Digital/analog hybrid instrument cluster displaying speed, RPM, fuel level, coolant temperature, odometer, trip meters, and warning lights.
ABS:
Optional Anti-lock Braking System available on some variants, enhancing safety.
Diagnostic Port:
Features a diagnostic connector for electronic fault finding and parameter adjustment using appropriate tools. The manual will detail its location and usage.
Oil Change:
Every 5,000 - 7,500 km (3,000 - 4,500 miles) or annually.
Air Filter:
Inspect every 5,000 km (3,000 miles), clean/replace as needed.
Spark Plugs:
Replace every 10,000 - 15,000 km (6,000 - 9,000 miles).
Valve Clearance:
Check/adjust every 10,000 - 15,000 km (6,000 - 9,000 miles).
Brake Fluid Flush:
Every 2 years.
Engine Oil:
SAE 10W-50, API SJ/SL or higher, JASO MA (e.g., Motorex Power Synt 4T 10W-50)
Coolant:
Mixture of distilled water and ethylene glycol-based coolant (e.g., Motorex Coolant M3.0). Capacity approx. 2.0 liters.
Fuel Pump Reliability:
Early models sometimes experienced fuel pump failures. Troubleshooting guides in the manual will cover diagnostics.
Water Pump Seals:
Occasional leaks from the water pump seal; manual will detail replacement procedure.
Idle Control Issues:
Some models reported rough idling or stalling, potentially related to throttle body synchronization or TPS (Throttle Position Sensor) calibration. The manual provides guidance for these adjustments.