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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.
2008 KTM 250 SX
on Dec 07, 2013
2008 ktm 250 sx.the bike starts and runs fine
Sounds like the main jet is clogged, or you have water in the bowl..
First try draining the bowl on the carb, drain into a glass so you can see if there is any water dirt etc... If there is water, it should be fine after that. If its the main jet you are going to have to remove the carb and clean it.
One other thing it may be. If it has a CV carb (constant velocity) the boot may be ripped on the slide causing it not to lift during acceleration.
2008 KTM 250 SX
on May 19, 2010
My 2006 Ktm 250 exc has been standing for 3 years, what should i check before starting it?Thank Mervin
Mervin, I'm not a motorcycle mechanic, but just knowing engines as I do, I would say drain the fuel tank and replace with new fuel and either a water remover additive or a more complete fuel treatment (Lucas makes some great products for that); pull the plug(s) and check them for any corrosion or buildup, replace if necessary; change the oil and filter; check the air cleaner; and check tensioning on any belts. I'd also suggest either replacing the battery straight away or just putting it on a charger for a while so you know it has a full charge when you go to start it - if you need to replace it, that will eventually become evident, but you should at least be able to get the engine started and see what else -if anything- needs doing.
KTM 250 SX...
on Dec 03, 2013
Hi, i have a 250sx
The starter pinion attached to the kick pedal has an ratchet pin that engages in the engine shaft - the role of the pin is to allow the engine to turn freely once started. This pin is pressed on the shaft with a simple spring that in your case either broke or went out of position.
You will need to open that side of the transmission, access the starter mechanism and refit or replace the pin and its spring - it's a delicate job, work very carefully or you can do a lot of damage if you try to start the engine with the parts misplaced.
KTM 250 SX...
on Sep 25, 2011
Oil drain plug case cracked 2007 KTM 450 SXF
Drain oil. Use degreaser to clean area. Use JB Weld & allow to set up properly before adding oil.
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on Mar 14, 2020
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