2018 KTM 350 SX-F is hard to stop and won't idle for very long

skylarmetz
Edited Date/Time 6/6/2023 4:19pm

Hello, 

I bought a 2018 KTM 350 SX-F today with 100 hours on it, when I bought the bike from the dealership it started fine and idled just fine but now that I'm home it will barely start, and when it does finally start it idles perfectly but after 15-30 seconds it just dies. I'm unsure what the issue is, I was thinking it was a possible clogged injector or a throttle positioning sensor. A friend of my mine thought maybe it could be the rollover sensor going bad as well. 

2018 KTM 350 SX-F is hard to stop and won't idle for very long

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40acres
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7/23/2017
Location
Houston, TX, USA
40acres 6/6/2023 4:58pm
6/6/2023 4:58pm

Sounds like you have a few options to start your troubleshooting process with. Let us know what you find. 

skylarmetz 6/6/2023 5:25pm
6/6/2023 5:25pm

UPDATE: I took the rollover sensor off as I read this was a common problem. Still no luck. I got it to start but even after the bike started it would only idle for a few seconds and even with a little bit of throttle it wouldn't stay running. 

RGaede
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1/10/2014
Location
Albuquerque, NM, USA
RGaede 6/6/2023 7:19pm
6/6/2023 7:19pm

Are you pressing in the cold start knob and letting it warm up with that on?   If the throttle cables are adjusted properly rotating the throttle tube a little forward will disengage it (handy since the knob is right by the pipe).

desertratlife 6/7/2023 6:24am
6/7/2023 6:24am

Don't forget to check the spark plug cap for cracks.  After repeatedly taking them out and putting them back on they, crack inside and then arc.

The Shop

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6/7/2023 8:23am

I had the same thing when there was a dirty filter in the fuel tube between the tank and the injector. Try removing the filter or replacing it with a new one.

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