Question about 2008 KTM 250 SX-F

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When is start my sxf 250 it ´runs for about 5 sek then its just dies. whats the problem?`´

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Lack of fuel.clean the carb out.

Posted on Jul 31, 2009


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Posted on Jan 02, 2017


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2011 KTM 250 SXF will not idle

Hi, Anonymous if your bike has been sitting idle for months or years and you did not do any pre-storage maintenance I feel your pain it will probably have a dead battery and not want to start or if it starts it will idle and run poorly, here are the following steps necessary to complete in order to get your bike back to an acceptable running condition.
1. If your battery was 2-3 years old when you last had the bike running you should replace it.
2. If you believe your battery might still be serviceable remove it from the bike and put it on a 1 or 2 amp trickle charger for 24 hours. If it is the old lead acid type with visible cells and acid levels fill each cell to the top line with distilled water and replace the caps, run the vent tube into a plastic or styrofoam cup, any cells that are cloudy/milky replace the battery.
3. After charging remove the leads and let the battery sit for a couple of hours then check the battery voltage with a volt meter, you should have 12.5 volts or better, any readings in the 11 volt range you need to do a proper load test on the battery and replace as necessary, any readings in the 10 volt range you have a dead cell and replace the battery.
4. Drain and flush fuel tank, google " how to clean a motorcycle gas tank" find a couple forums to view the different options available.
5. Remove your air cleaner and clean and re-oil per Mfg. specifications.
6. Remove the carburetor, disassemble and decontaminate with a carb dip or if you have EFI remove injectors and clean with carb spray and compressed air
7. Remove fuel valve and filter disassemble and clean as necessary, remove fuel lines and replace with new ones.
8. Replace spark plug with a new one and check for spark.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
250 sxf wont idle 250 350 450 505 SX XC 4 Strokes
2012 KTM Fuel Injection Filter Discussion Enduro360 com

May 06, 2016 | 2011 KTM 250 SXF

1 Answer

2008 ktm sxf 250 kick lever jammed

could be as simple as water in the fuel.
kick starter issue: need to remove side cover and inspect!

Jul 21, 2014 | 2008 KTM 250 SX-F

1 Answer

2011 ktm250 sxf wont start

i have a 2009 ktm 450 sxf and was riding yesterday and it stalled out when i switched to fourth gear and wont start back. battery is good and when i hit the e start it just clicks once, and it wont roll start either. any suggestions? could it be the switch under the tank? PLEASE HELP!

Sep 24, 2012 | 2008 KTM 250 SX-F

1 Answer

Starting Problems Ktm 450 sxf

It's your batt....... simple. The last three replys are the stupidest things I have ever heard!!.

Mar 21, 2012 | 2011 KTM 450 SXF

1 Answer

2011 250 sxf . owned for 8 months bought new.problem is the bike will die as soon as you give it gas.problem is very intermitent. may run great for a while then will start doing it again. been to dealer 6...

When you "give it gas" you are opening the throttle.
At that point the fuel system is supposed to supply the engine with more fuel to maintain the air/fuel mixture.
Check for anything that might be clogged like filters, hoses, fuel passages, etc.
If it is still under warranty you could void your warranty
if you work on it though in this case a warranty is meaningless if you have taken it in 6 times.
I've seen models where you could replace everything and
a week later it would refuse to run.
Sometimes it's better to leave the thing at the junk yard and buy a new one but that doesn't happen often.

Nov 02, 2017 | 2011 KTM 250 SXF

1 Answer

When I start up my Toshiba laptop I hear the cooling fan starts running for about 5 - 8 sek. the screen remains black and then the computer switches itself off completely. After abuot 3 sek. the PC is...

Sounds like your OS installation got corrupted somehow. See if you can boot to the recovery/ diagnostic partition if you have one. (On dells it is F8 at startup, but yours may be different). If you can get in there run the diagnostics and see if it finds any problems.
I would also try booting into a bootable version of linux like ubuntu. You can simply download it and burn to a cd, then put that in your drive and boot linux right off the disc. If you can successfully boot that way then you know that your hardware is ok and it is a problem with your OS. If that is the case you need to reinstall windows or try doing a windows repair.
If this was a help please give me 4 thumbs up as I am trying to build up my rep on this site!

Mar 03, 2011 | Toshiba Satellite L305-S5877 Notebook

2 Answers

My iphone just went dead all of a sudden and it won't come back on.

Charge it and hold down the home and power (same time) button 10-20 sek

Feb 04, 2011 | Apple iPhone Smartphone

1 Answer

Brand new battery fully charged flat after 5 or 6 starts on my sxf 450 08

Sound like alternator is not charging the battery. Crank the engine up and while running disconnect the positive terminal from the battery. If the engine dies, you have an alternator problem.

Feb 08, 2010 | 2008 KTM 450 SX-F

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