11-5
TECHNICAL SPECIFICATIONS – ENGINE 990 SUPER DUKE / SUPER DUKE R Engine Design Displacement Bore / Stroke Compression ratio Fuel Valve timing Valve diameter Valve clearance, cold Crankcase bearing Conrod bearing Piston pin bearing Piston Piston rings Engine lubrication Engine oil Quantity of engine oil Primary drive Clutch Transmission Gear ratio
Mixture preparation Ignition system Ignition timing Generator Spark plug Electrode distance Cooling system Cooling liquid Starting aid
LC8 Liquid-cooled, 2-cylinder 4-stroke engine with 75° V arrangement with balancer shaft and electric starter 999.9 cm3 101/62.4 mm 11.8:1 unleaded premium fuel with at least RON 95 4 valves controlled over bucket tappet and 2 camshafts, camshaft drive with gears/chain Intake: 38 mm Exhaust: 33 mm Intake: 0.10 - 0.15 mm Exhaust: 0.25 - 0.30 mm Friction bearings (2 main bearings / 1 supporting bearing) Friction bearing Dual-fuel bearing Light alloy – forged 1 compression ring, 1 taper face ring, 1 single-piece oil scraper ring with spiral-type expander Dry sump with 2 trochoidal pumps (pressure pump and suction pump) SAE 5W/40, 10W-50 (f.ex. Motorex Power Synt 4T) approx. 3.1 liters during oil/filter change or approx. 3.3 liters for dry engine Straight-toothed spur wheels 35:67 Multi-disc clutch in oil bath 6-speed claw shifted 1st gear 14:36 2nd gear 16:30 3rd gear 20:30 4th gear 21:27 5th gear 23:26 6th gear 25:26 EFi (Electronic Fuel Injection) breakerless transistorized electronic ignition system with digital ignition advance map-controlled 12V 450W at 6000 rpm NGK CR 8 EK 0.8 mm liquid cooled, permanent circulation of cooling liquid through water pump 2.1 liters, 50% antifreeze, 50% destilled water, at least –25° C 0.9 kW electric starter