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4
Joined
10/4/2020
Location
New Port Richey, FL
US
Mike325
10/4/2020 8:03am
10/4/2020 8:03am
Have a 2019 YZ250F with 27hrs on it (bought new 1 year ago). At about 22hrs it stalled on me while exiting a corner. Didn't think too much of it until it happened a couple more times a week later. A friend suggested replacing the spark plug because his son experienced similar symptoms with his 2014 yz250f and the plug change fixed it. So I did that and the next time I rode it stalled on the 3rd lap after landing from a jump. It started right up and I tried to continue to ride it but any throttle position below half throttle the engine would try to die.
Sometime before this issue started I changed to non-ethanol fuel with octane booster. Maybe not the smartest decision but have have had multiple issues on previous bikes when sitting for extended periods of time.
Anyway, thinking this might be my issue I drained all the fuel from the fuel tank and fuel lines and refilled with 93 octane pump gas. Oh and installed another new plug as a precaution. Rode yesterday and from the start the bike seemed to be running 'dirty' below half throttle. I was able to put in 3 rides and then on the fourth the bike stalled again. It quickly restarted and I continued to ride it in the upper rpm's for another two laps until it tried to stall again, in the elevated rpm range.
At this point I don't believe the issue to be related to the fuel, unless maybe the injector is partially clogged? Not sure that's even a possibility.
No codes have been thrown on the power tuner app.
Motor is stock with a Dr. D exhaust that was installed after a couple hours. Running the TP map.
Any suggestions?
Thanks.
Sometime before this issue started I changed to non-ethanol fuel with octane booster. Maybe not the smartest decision but have have had multiple issues on previous bikes when sitting for extended periods of time.
Anyway, thinking this might be my issue I drained all the fuel from the fuel tank and fuel lines and refilled with 93 octane pump gas. Oh and installed another new plug as a precaution. Rode yesterday and from the start the bike seemed to be running 'dirty' below half throttle. I was able to put in 3 rides and then on the fourth the bike stalled again. It quickly restarted and I continued to ride it in the upper rpm's for another two laps until it tried to stall again, in the elevated rpm range.
At this point I don't believe the issue to be related to the fuel, unless maybe the injector is partially clogged? Not sure that's even a possibility.
No codes have been thrown on the power tuner app.
Motor is stock with a Dr. D exhaust that was installed after a couple hours. Running the TP map.
Any suggestions?
Thanks.
Paw Paw
Check the injector then fuel pump.
The Shop
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