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Old September 13th, 2018, 06:21 AM   #5
Triple Jim
Guy Who Enjoys Riding
 
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Name: Jim
Location: North Carolina
Join Date: Jul 2016

Motorcycle(s): Ninja 250

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MOTM - Oct '18, Aug '17, Aug '16
Quote:
Originally Posted by rustyshackelford View Post
It seems weird to me that giving it gas at the throttle makes it stall but giving it gas at the choke helps.
If we assume you have something restricting fuel flow, when you use the enricher lever, you're adding quite a bit of fuel to the mixture and not much air, making up for the clog. When you open the throttle, you're adding air only, since the fuel flow is blocked, and that makes it to go lean and stall.

The cause of the lack of fuel could be what DannoXYZ suggested, or a petcock that's not flowing fuel, or a blocked tank vent, etc.. Your symptoms are pretty typical of a blocked tank vent, and you can check this by opening the filler cap when it stalls, and see if you hear the whoosh of air entering the tank, followed by a properly running engine.
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