2020 YZ250f randomly dying

GetItOnLikeTron

I have a yz250f that has been having a weird issue for a little while now. While riding the bike runs great then after 30mins or so the bike will just die out. While the bike is dying out it sounds as if the kill switch is depressed. Then i press the start button then the bike fires right up and runs great for like 30-45mins then does the same thing. I chased the kill switch to the wiring harness and everything looks good. Any ideas?

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wrc777
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wrc777 5/5/2023 5:52am
5/5/2023 5:52am

Could be the fuel pump, but I would expect the power to drop off as it heats up and gets weak.

Leeham
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Leeham 5/6/2023 1:45pm
5/6/2023 1:45pm

Its likely a fueling issue. Along with the pump check the injector.

GetItOnLikeTron 5/18/2023 4:22pm
5/18/2023 4:22pm
wrc777 wrote:

Could be the fuel pump, but I would expect the power to drop off as it heats up and gets weak.

But the thing is there is no power drop at all. After dies it starts right up and runs mint.

wrc777
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wrc777 5/18/2023 6:11pm
5/18/2023 6:11pm Edited Date/Time 5/18/2023 6:12pm
wrc777 wrote:

Could be the fuel pump, but I would expect the power to drop off as it heats up and gets weak.

GetItOnLikeTron wrote:

But the thing is there is no power drop at all. After dies it starts right up and runs mint.

Check the fuel pressure it might be strong enough to run but not make full power. Could be bad plug wire or ecu. Have you tried unplugging the kill switch? I know of a yz125 that had a bad switch and would just cut out. 

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GetItOnLikeTron 5/30/2023 10:48am
5/30/2023 10:48am
Leeham wrote:

Its likely a fueling issue. Along with the pump check the injector.

Just tried my buddies fuel tank and pump on my bike the issue is still happening.

GetItOnLikeTron 6/16/2023 1:05pm
6/16/2023 1:05pm

I seemed to have found the issue. Cleaned the injector and now is running good.

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