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KTM 250 SX-F USA 2010 User Manual

KTM 250 SX-F USA 2010
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MAINTENANCE WORK ON CHASSIS AND ENGINE 58
13.46Checking chain wear
Jack up the motorcycle. ( p. 40)
00
0
BB
0
0
AA
1 2 3 16 17 18
400226-10
Shift transmission to neutral.
Pull on the upper part of the chain with the specified weight .
Guideline
Weight of chain wear measurement 10… 15 kg (22… 33 lb.)
Measure the distance of 18 chain links in the lower chain section.
Info
Chain wear is not always even, so you should repeat this measurement at
different chain positions.
Maximum distance at the longest
chain section
272 mm (10.71 in)
» If the distance is greater than the specified measurement:
Replace the chain.
Info
When you replace the chain, you should also replace rear sprocket
and engine sprocket.
New chains wear out faster on old, worn sprockets.
Remove the motorcycle from the work stand. ( p. 40)
13.47Adjusting chain tension
Warning
Danger of accidentsDanger caused by incorrect chain tension.
If the chain tension is too high, the components of the secondary power train (chain, engine sprocket, rear sprocket, bear-
ings in transmission and rear wheel) are under additional load. Apart from premature wear, in extreme cases the chain can
rupture or the countershaft of the transmission can break. On the other hand, if the chain is loose, it can fall off the engine
sprocket or the rear sprocket and block the rear wheel or damage the engine. Check the chain tension and correct if neces-
sary.
Jack up the motorcycle. ( p. 40)
400213-10
Push the chain up at the rear edge of the chain guide to measure the chain ten-
sion .
Info
The upper chain section must be taut.
Chain wear is not always even, so you should repeat this measurement at
different chain positions.

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KTM 250 SX-F USA 2010 Specifications

General IconGeneral
Displacement249.5 cc
Bore x Stroke78 mm x 52.3 mm
Compression Ratio13.5:1
Transmission5-speed
Fuel SystemElectronic Fuel Injection
Rear SuspensionWP Monoshock
Front Brake260 mm disc
Rear Brake220 mm disc
Seat Height950 mm
Fuel Tank Capacity7.5 Liters
IgnitionKokusan
Front Wheel21 Inch
Rear Wheel19 Inch
Fuel Capacity7.5 Liters
Engine TypeSingle-cylinder, 4-stroke
Front SuspensionWP 48 mm
EngineSingle-cylinder, four-stroke
StarterKickstarter
FrameCentral Tube Frame Made of Chrome Molybdenum Steel Tubing

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