
ENGLISH
48
TECHNICAL SPECIFICATIONS – ENGINE
»
10W/50
5W/40
JASO T903 MA
TEMPERATURE
0°C
32°F
ENGINE
990 LC8
Design
Liquid-cooled, 2-cylinder 4-stroke engine with 75° V arrangement with balancer shaft and electric starter
Displacement
999 cm
3
Bore / Stroke
101/62,4 mm
Compression ratio
11,5:1
Fuel
unleaded fuel with at least RON 95 (USA: Premium RON 91) *
Valve timing
4 valves controlled over bucket tappet and 2 camshafts, camshaft drive with gears/chain
Valve diameter
Intake: 38 mm Exhaust: 33 mm
Valve clearance, cold
Intake: 0,10 - 0,15 mm Exhaust: 0,25 - 0,30 mm
Crankcase bearing
Friction bearings (2 main bearings / 1 supporting bearing)
Conrod bearing
Friction bearing
Piston pin bearing
Dual-fuel bearing
Piston
Light alloy – forged
Piston rings
1 compression ring, 1 taper face ring, 1 single-piece oil scraper ring with spiral-type expander
Engine lubrication
Dry sump with 2 trochoidal pumps (pressure pump and suction pump)
Engine oil
SAE 5W/40, 10W/50 (Motorex Power Synt 4T) #
Quantity of engine oil
approx. 3.1 liters during oil/filter change
Primary drive
Straight-toothed spur wheels 35 : 67
Clutch
Multi-disc clutch in oil bath
Transmission
6-speed claw shifted
Gear ratio
1
st
gear 14:36
2
nd
gear 16:30
3
rd
gear 20:30
4
th
gear 21:27
5
th
gear 23:26
6
th
gear 25:26
Ignition system
breakerless transistorized electronic ignition system with digital ignition advance
Ignition timing
Map-controlled via TPS
Generator
12V 450W bei 6000 U/min
Spark plug
NGK DCPR 8 E
Electrode distance
0,8 mm
Cooling system
liquid cooled, permanent circulation of cooling liquid through water pump
Cooling liquid
2.1 liters, 50% antifreeze, 50% water, at least –25° C
Starting aid
electric starter
#
PON / CLC
RON / ROZ
MON
87
91
83
91 Premium
95
87
RON = Pump Octane Number
CLC = Cost of Living Council
RON = Research Octane Number
ROZ = Research Oktan Zahl
MON = Motor Octane Number
*
Summary of Contents for 990 Super Duke 2005
Page 20: ...ENGLISH 19 ...
Page 51: ...ENGLISH 50 ...