YZ250FX fuel pump quit

Tuna
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Tuna
Edited Date/Time 8/2/2017 2:41pm
An hour into my ride tonight my bike died. It felt like it ran out of gas. Fuel pump is not priming so I'm assuming the pump is not working. I have not heard of any fuel pump issues on these bikes. Anyone know where to start or possible causes?
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Paw Paw
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Paw Paw 8/1/2017 7:28pm
8/1/2017 7:28pm
I just fixed a local bike that did the same thing. It turned out to be that the pet cock came apart internally and stopped the fuel flow.
On another one I found a dirty electrical connection to the fuel pump.
If your bike has an inline filter it too should be checked.
Most bike have a fuel pump relay and most have a fuse that can go bad.

Paw Paw
Tuna
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Tuna 8/2/2017 4:46am
8/2/2017 4:46am
Anyone know where the oump relay is? Manual is not very clear.
Paw Paw
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Paw Paw 8/2/2017 7:44am
8/2/2017 7:44am
It should be mounted next to the starter relay right by the battery.

Paw Paw
Tuna
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Tuna 8/2/2017 2:41pm
8/2/2017 2:41pm
Got it fixed. Tested the pump with direct power and it wouldn't run. Figured it was bad. Was right about to order a new one and figured I better pull the old one out first and bam!

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Paw Paw
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Paw Paw 8/2/2017 5:00pm
8/2/2017 5:00pm
Yes, I have seen that before too, but mostly on KTM's.
Great find.

Paw Paw
Tuna
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Tuna 8/2/2017 5:21pm
8/2/2017 5:21pm
Paw Paw wrote:
Yes, I have seen that before too, but mostly on KTM's.
Great find.

Paw Paw
Thanks for your suggestions. Got me looking in the right direction.
CarlinoJoeVideo
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CarlinoJoeVideo 8/2/2017 7:33pm
8/2/2017 7:33pm
Tuna wrote:
Got it fixed. Tested the pump with direct power and it wouldn't run. Figured it was bad. Was right about to order a new one and...
Got it fixed. Tested the pump with direct power and it wouldn't run. Figured it was bad. Was right about to order a new one and figured I better pull the old one out first and bam!

I've seen the race teams saftey wire those connections on or heat shrink wrap them tight.
Tuna
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Tuna 8/3/2017 5:10am
8/3/2017 5:10am
Yup, I shrink wrapped it good. No idea what happened to the original from the factory.

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