20 Most Recent 2005 KTM SX 250 Questions & Answers

Thanks for contacting FixYa. I was reviewing some of the older un-answered questions trying to ensure your issue has been resolved.

Check for the obvious things first. If it happened suddenly maybe you lost a bolt or a pin in the linkage and the mono-shock is not connected. Secondly confirm that the shock shaft has not broken. This being said, if all confirms OK then you will have to remove your shock and take it in to the dealer for rebuild. You may have blown out the seals. There are some 2nd party services on line like "White Power, that may be less expensive.

TF

Either the shift linkage could be binding or you may need to adjust the clutch.
The other problem might be a synchronizer in the transmission going bad.

depends on what you want to adjust??...comperstion..rebound..or ride hight??

first you need to remove carb clean them , then new gaskets . sounds like they are glazed due to old fuel drain tank and refill with new fuel

From what I've heard and read it is a great bike with the exception of poor spring rates from the factory. Almost every one seems to agree that it needs stiffer springs.,,

Needs lower head gasket

Check again for a bolt on the inside surfaces of the cases. All bolts are NOT on the edges!!!

Air leak on the air filter side of fuel system. Check all clips are secure.

This should answer your questions:http://www.eurospares.com/graphics/suspension/springchart.jpghttp://www.eurospares.com/graphics/suspension/SWspring001.jpghttp://www.eurospares.com/graphics/suspension/SWspring002.jpghttp://www.eurospares.com/graphics/suspension/SWspring003.jpg

Bad piston / rings or perhaps a blockage in the crankcase ventilation system.A compression test will tell you the condition of your piston / ring / cylinder. Look closely around your engine for fresh sign of oil "weeping" from any gasket surfaces. This may help determine a blocked vent as pressure can build in the crankcase and find any way out it can via gaskets / seals / or past the rings into the combustion chamber.

Thank you for contacting FixYa with your inquiry. I have been going
over some of the older help requests that have been archieved and
trying to provide solutions for those that didn't get answered. Hope
this information helps.

Try these:

KTM Owners Manual

http://www.ktmusa.com/download.php?dataID=8101G9_OM_EN.pdf

KTM Service Manual

http://www.ktmcyclehutt.com/ktm-parts/ktm-parts-search.php?ktm-motorcycle-parts=Repair-Manuals&year=2007&ktm-model=sxf-450&fitment=bigbikes-all

KTM Repair Manuals Order Site

http://www.repairmanual.com/KTM.html

http://www.tryvod.com/search/ktm-2008-450-xcf-owners-manual-download.html

http://www.pdf-manual.com/user-guide-instruction-owner-manual-ktm-450-exc-2008-17793.html

http://www.pdf-manual.com/telechargement2.php?id=17793

http://www.mydrive.ch/browse#/

Manuals General:

http://www.dansmc.com/shopmanual2.htm

Other Manuals Sites: http://www.fixya.com/motorcycles/ktm

Up front on the fork, "Compression" (factory set to 18). Leave it there for beginner. Turn it down as you get better (17 for novice, 15 for intermediate and 13 for pro). "Fork Rebound" (factory set to 21). Turn it up a click for more advanced riding. Otherwise, leave it alone. REAR SHOCK "Low-Speed Compression" (factory set to 15) Turn it down for advance riding ( 11-14) otherwise leave it stock. "Rebound" (factory setting is 24). Turn it up for advanced riding (25 or 26) "High-Speed Compression" (factory is 1.25) Turn it up for advanced riding (up to 1.5) "Sag" (Factory set to 110 - 113 mm) Turn it up for advance riding (113 to 120 mm). good luck
113 112-
120 109-
113

Read more: http://www.dirtrider.com/reviews/motocross/141_0901_first_test_2009_ktm_250_sxf/ktm_250_sxf_specs_settings_suspension.html#ixzz1MxEcU5bW

On the side of your motor you have a oil level crew. fill her up till it comesa out.

That will be either adjustment, bent plates or the oil used is the wrong grade. As it is a 2011 model, it will be covered under warranty.

Check spark plug and carb.

If you don't mind a few oil drips on the garage floor it should not hurt anything provided the leak isn't so bad that a constant drip is present. Running out of gearbox oil would not be a good thing. Why not just get a new seal?

If the engine still turns, you will most likely need to get the transmission (Cases) split open. First check to see if the shifter lever moves up and down, and if not, this may be a good place to look into. If not, a bent shift fork, notched shift drum, or bad gear could be the issue.

It can be just the head gasket. The KTM are very good bikes, if the price is good Go for it. Replacing the head gasket will alow you to see for yourself whats up. 

That would be like riding a fixed wheel bike.Think about how you will stop and start. Only hydraulic fluid will leak. Bad idea!