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KTM 990 SUPER DUKE User Manual

KTM 990 SUPER DUKE
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Chain maintenance
For long chain life, good maintenance is very important. X-ring chains require only modest
maintenance. The best way is to use lots of water, but never use brushes or solvents. After
letting the chain dry, you can use a special X-ring chain spray (Motorex Chainlube 622).
NO LUBRICATION IS ALLOWED TO REACH THE REAR TIRE OR THE BRAKE DISK, EITHERWISE
THE ROAD ADHERENCE AND THE REAR WHEEL BRAKING EFFECTS WOULD BE STRONGLY
REDUCED AND THE MOTORCYCLE COULD EASILY GET OUT OF CONTROL.
THE CHAIN DOES NOT HAVE A CHAIN JOINT FOR SAFETY REASONS. ALWAYS HAVE THE CHAIN
REPLACED IN AN AUTHORIZED KTM WORKSHOP WHERE THE SERVICE TECHNICANS HAVE
THE REQUIRED RIVETING TOOL.
NEVER MOUNT A NORMAL CHAIN JOINT.
Also check sprockets and chain guides for wear, and replace if necessary.
Checking the chain for wear
To check the chain for wear proceed as follows:
Switch the transmission to idle and put a load of approx. 15 kilograms
(33 lbs) on the lower part of the chain (see illustration). Now measure the distance between
18 chain rollers on the upper part of the chain. The chain needs to be replaced when the
distance is 272 mm (10.70 in). Since chains do not always wear evenly, repeat the meas-
urement at different parts of the chain.
Replace the chain if any X-rings are missing.
NOTE:
If you mount a new chain, the sprockets should also be replaced. New chains wear faster if
used on old used sprockets.
MAINTENANCE WORK ON CHASSIS AND ENGINE »
41
15 KG
max. 272 mm
1 2 3
16 17 18

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KTM 990 SUPER DUKE Specifications

General IconGeneral
Engine TypeV-Twin, 4-stroke
Displacement999 cc
Bore x Stroke101 mm x 62.4 mm
Compression Ratio11.5:1
Fuel SystemElectronic fuel injection
Transmission6-speed
Front SuspensionWP USD 48 mm
Rear SuspensionWP monoshock
Front Tire120/70 ZR17
Rear Tire180/55 ZR17
Dry Weight186 kg
Fuel Capacity15 liters
Power120 hp @ 9, 000 rpm
Torque100 Nm @ 7000 rpm
Cooling SystemLiquid cooled
FrameChromium-molybdenum trellis frame
Front Brake2 x 320 mm discs, 4-piston calipers
Rear Brake240 mm disc, 2-piston caliper

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