Question about 2003 KTM SX 250

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Black plugs I suffer the same problem with my 2003 sx 250 , after mabey 3-5 hours use my bike wont start then pop in a new plug and bingo , bike fires up first time . Alistair T Scotland

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Black Plugs are indicating that your bike is running too rich(too much fuel to air mixture) you need to have the carburator adjusted,more air.Good Luck.

Posted on Sep 09, 2009


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2003 Buell Blast starting problem

It may depend on what you call choking the engine off. If you actually choked it off you may well have flooded the cylinder and plug with gas and now have wet plugs. Often in high performance motorcycles like your Buell even with a new plug that has never been fired or only fired few times it it gets wet it may still look brand new but refuse to start the engine because it got wet. SO, try new plugs and do not choke it off when you want to stop it.

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Hi, Sagi nice novella and the usual suspects are:
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3. Incorrect spark plug for the engine type or service.
4. Piston rings badly worn or broken.
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2 Answers

2003 KTM 250 SX won't start. When you kick it, it starts to fire but never turns over. I accidently put the wrong gas in it. It takes 60:1 but I didn't put enough oil in it. It died while I was riding it....

If you have run the engine with too little oil then there is probably damage to the piston / rings & / or bore
Remove the exhaust to have a look

Ride Safe

Jun 03, 2010 | 2003 KTM SX 250

1 Answer

My 2003 sx 250 is fouling plugs at cold starts etc

Why 50:1?
All bikes should be 32:1, and then jet to match that.
Your oil is fine, and yes...go smaller on the pilot.

Dec 08, 2009 | 2003 KTM SX 250

1 Answer

I have a RM 250 2005. A spark plug only lasts for about 3 hours riding time and will no longer work. As soon as i put a new plug in i will get another 3 hours riding time. Its not fowling the plug but i...

You need to change the spark plug here say if it is a BR 8ES (NGK) then move on to BR 6ES and if that fail then move to BR 10ES..I use to do racing and its to do with playing with that until it is sorted..Now you may also have a faulty coil, faulty spark plug cap or something else here.It may not necessarily mean it is the spark plug.

Sep 21, 2009 | 2005 Suzuki RM 250

1 Answer

My ktm sx 250 03 fouls plugs erraticly runs geat wi new plug nxt day fould i go threw a plug a day carb is clean.mix 40:1fullysynth.i dnt thnk crank seals but im not a bike xpert

hi bud on carb there are 2 screws the mixture screw is the one you need screw it in 1/2 of turns or more if required at the moment your fuel is too rich which is putting to much fuel too the plug so do what i said and try a br8es/br8eg sparky good luck bude6f9ac3.jpg

Aug 29, 2009 | 2003 KTM SX 250

3 Answers

Gv 250 wont stay running

read my solutions on this site for clogged carbs.....Tim

Jun 01, 2009 | 2002 Hyosung GV 250 Aquila

3 Answers

New spark plugs last 10-15 minutes of riding

Hi and welcome to FixYa,

Offhand, the only factor to be checked that could foul a sparkplug for your bike would be the 2T oil injector/pump. There is too much 2T oil going to the combustion chamber. Either the injector would require restricting or for some reason, there is also 2T oil in the fuel tank (pre-mix).

Good luck and Thank you for using FixYa. Happy Holidays.

Dec 07, 2008 | 2008 KTM 250 SX

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