Question about 2005 KTM EXC 250

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Hi i have a ktm 250 07 excf which seems to stall alot when warm bike starts first time when cold i have replaced the plug so far can you help

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Hi I'm not the expert but it seems like the bike needs valve cleaning and adjusting, just apply fine robbing paste on the seats of the valves and valves it self and adjust them as best as possible. I have the same issue, working on it right now. I've done this in the past on KTM 450 sx 2006 and worked well. I'm still running stock valves so once they get older there is soot and carbon accumulation.

Posted on Jul 11, 2013

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Is it powerfull when it becomes hot or is it sluggish :?

Posted on Nov 16, 2009

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Posted on Jan 02, 2017

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2013 KTM XCF-W Will not start.

Yes I to have washed a bike to death.You will need to dry the air filter .Is you bike fuel injected?If so take a hair dryer and warm all the connections concearning spark and fuel injection .You should then put dielecric grease on all your connectors.If you bike is carb model then just drain the float bowl.

Apr 28, 2014 | 2013 KTM XC 250 F

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Clutch does not engage well, especially when cold. First shift into gear will always stall motor.

to me this seems a case of many things not 100% set up properly.

big singles do burn a lot of oil, so either its low or just the wrong viscosity, check with a KTM forum as a lot of users will have already had this problem and rectified it.

but the first thing i'd check first is: Idle speed (if its FI then shouldnt be a problem) valve clearances and it also depends on whether you have any mods?

a race spec pipe will always cause issues starting cold.

Sep 27, 2012 | 2008 KTM 505 SX-F

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I have a KTM EXCF 2007. approx about 60 hours, good compression. I have a flat spot from idle, as soon as hit the throttle the engine can die totaly and not recover and stalls. Even when sitting on the...

Hope you have kept notes on all the carb setting changes.
Did the problem start when the exhaust was modified? If not it may not be a carb problem.
Does the problem change if the engine is cold or hot?
Does it make any difference with the choke on?
Is the air filter new and clean, new plug, valve clearances adjusted, new oil.
I know I havent answered the question, but hopfully gives you a few more things to check

Jul 28, 2011 | 2008 KTM 250 SX-F

1 Answer

Where can i purchase a wprk shop manual for a ktm 250 excf 2007?

you would be best directed to ebay, type in on your search engine page ktm 250 excf 2007 workshop manual ebay, this should flag all items related to this on ebay. happy shopping.

Jul 13, 2011 | KTM EXC 250 Motorcycles

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I have a 2004 ktm 950 adventure with 26,000 miles. Replaced the two head gaskets about 400 miles ago because it was building pressure in the coolant system and filling up reservoir then blowing it out the...

Hi, Rhodgin first thing I would do is check for coolant in the oil and oil in the coolant then I would bleed both systems for uninvited air for more information about your question and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
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Mar 25, 2017 | 2004 KTM 950 Adventure

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Starts ok when cold stalls when hot and wont re start, i have checked valve clearances

Do not twist the throttle when re-starting a hot engine. That bike floods easily. The power valve in the carb squirts gas into the cylinder with every twist of the throttle. A fresh spark plug will also help.

Feb 02, 2011 | 2008 KTM 250 EXC-F

1 Answer

Have a 2005 ktm 525 exc,after 20 mins of riding it starts missing and stalls when slowing down for gate or log ect,when i try to start it takes a bit and will pop or backfire through exhaust, had jd kit...

sounds rich, especially if its a problem when it warms up, was the JD kit a much bigger main jet,might need to try standard main, is it standard exhaust, I assume the air cleaner is clean and good condition, the foam can deteriate over time.Not sure if you have a hot start button or lever, this leans the mixture, if you have one and it helps then its definately rich

as a non related hint I use moreys upper cylnder lube in my WR it starts easier, idles easier, doesnt stall as easy under hard braking, and doesnt seem to get as hot and ping when working hard in tight bush.

Apr 28, 2010 | 2005 KTM EXC 525 Racing

1 Answer

Bike starts fine but after it warms up it has to cool down before it starts have just had the valves adjusted

If you are saying the bike will start fine when cold, but after it is warm it will not start then I would recommend inspecting and or replacing the intake gasket / material. What may be happening is after the bike gets hot the 'seal' is lost and that makes for a lean condition, hence not starting. you may have other issues, however this is a cheap potential solution. Hope this helps,


Nov 30, 2009 | 2004 KTM SX 450 racing

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Ktm 530 /08 model has 88-100 miles on it i cant keep it running,wont start wont kick ,some times i can kick and then use electric start, if i turn it off battery seem dead, 3rd battery ,dealer is scra

This is obviously a problem in design of the bike. Weak circuit board design creating a shallow spark or mis-timed spark, OHC timing far too radical, carb design not compatible with the bore of the bike, factory valve angles out of whack, something, or several somethings have converged in this bike. Does your state have a "Lemon Law"? Many states have this and it forces the dealer to refund your money or replace the bike. Contact the KTM Corporate office > > KTM-Sportmotorcycle AG
Stallhofnerstraße 3, A-5230 Mattighofen
Tel. +43 7742/6000-0, Fax. +43 7742/6000-0

May 29, 2009 | 2008 KTM 530 EXC-R

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Start fail

just wondering if anyone can help me. I bought my son a second hand for the christmas of 06 (2005 model). He has not used it since last summer as I have not had the time to take him out on it we both tried starting it the other day without success. I am not a technical man and I cant find anything on starting it. We didnt use the choke, but I am just looking for some help to have it up and running for him, as he has been deprived of it. Thanks very much lads, he and I will both appreciate it!! ,I would pull the plug to make sure its not fouled. If it is then replace it with a new one. Then try starting it. As far as choke operation, pull the choke out, start the bike let i idle for a minute or two, push the choke back in and continue to warm up the motor.,,,

Nov 10, 2008 | 2004 KTM EXC 200

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