Question about 2008 KTM 105 XC

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My ktm 105 isn't getting no fire .

The bike ran fine last time i rode it about 3 mts ago . When I try to crake it it gets no fire. I checked the spark plug wire for fire ,no fire there. I checked the kill swicth found no problem there.

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You need a new ignition coil

Posted on Jan 10, 2009

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I have a 2000 CR 250, has always ran perfect and now will not start or fire. It has spark and is getting fuel to the carb(cleaned it spotless) air filter clean also. Fuel is fresh (use non-ethanol Supreme)...


Try starting it with a brief spray of ether into the intake. If it runs briefly it indicates a fuel/carb problem.

If it doesn't run the problem could be spark related, poor induction due to crank seals or other air leaks or perhaps oil is settling in the crankcase and corrupting the incoming charge.

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Hi, Sagi nice novella and the usual suspects are:
1. Fuel mixture too rich or enrichner left out too long.
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3. Incorrect spark plug for the engine type or service.
4. Piston rings badly worn or broken.
5. Valve guides are badly worn and/or seals worn, crushed or have come off the valve guide and are pumping oil through it.
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For more information about your issue 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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Had this very same problem with a KX 85 last week! Turned out funnily enough to be the spark plug. So try this first mate. If that dosn't fix it then you have the age old mechanics question "did I do somthing wrong or is it just a coincidence". Start back at your beginning next & re-check your valves.Most of these late model bikes(12000-16000rpm screamers) have titanium COATED valves. Once the coating wears off they close up valves REALLY QUICKLY!!!!! If the clearances are ok your work was good & at least it will rule out insuficient valve clearance as the cause to your problem.If it still plays up - well then I would use the process of elimination to solve the problem i.e is it electrical,fuel, or mechanical. With valves checked already a compression or leakage test would pritty well rule out the mechanical system.To test electrics on motorcycles without test equiptment & a lotof know how can be difficult & EXTREMELY DANGEROUS( shock hazard 40,000 v+). So I'll try keep it simple. On the web you can purchase ignition spark testers that will connect to any plug lead & cause the ignition system to jump a gap of 6 to 8mm.These are cheap & will test the system as a whole for its performance. Great for a quick check of any ignition system. If the spark seems fine then your left with the fuel system. check for blocked fuel tap,water in tank or carby bowl,blocked fuel filler cap vent,blocked carby vent hoses,accellerator pump function.
I hope this has been somewhat helpfull.
I am happy to help with further questions
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Fuel becomes like a gel substance if the bike was not used for some time. There may be some gel blocking the main jet of your carburetor. If the gel formed in the tank, it may take a while to reach the carburetor. That may be why it operated without a problem for a while.

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Well, depending on what your mechanical skills are, it may be tough to troubleshoot and fix your problem. I have the same exact bike, and it along with all other sport bikes are tough to work on because everything is very confined. You first have to start with the basics, Fuel, Spark, and Compression. Your going to have to get the fairings off and remove the gas tank before you test any of that. Once the tank is off, you can get access to the spark plugs and wires to do a spark test. Also while you are there, check to make sure the carb is getting sufficient fuel, or even possibly too much fuel. Leaky needle and seats in the carb bowls can cause lots of problems for starting and idling. And please don't blow yourself up! Exposed gas and spark test can equate to big flame balls if your not careful. If you need more help, I'd be willing to do what I can for you so shoot me an email at jmegashiftstyle@aol.com.

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my polaris outlaw 500 sarted cuting out last ride could not ecerate past 1/4 throtle and was back fireing so went to fix and wont run at all i have spark, plug is wet, changed fuel, seems to have compresion, when it turns over it tries to fire at times more like a hickup almost stops the sarter and a puff of smoke out the carb. im about to tare it down any ideas whats wrong ? bike was hard to start but ran ran perfect killed raptors with ease. bike was bored and built by some shop before i owned using ktm sleave and piston ? motor says nicols 520. didt over heat or make noises. have tried cleaning carb, jeting no luck please help

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