Banshee won't start

[Johnson87]

I was driving my quad went from 4th to 5th and cracked into the throttle out of no where it comes and died now it won't start unless I dump fuel into heads and when it fires it revs out really bad any ideas

[the boris]

Looks like fuel supply problem but did you check the compression?
What is the history of the bike,rebuild recently,any other issues before that happened?

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[trickedcarbine]

If it’s revving onnits own and trying to runaway, that’s gonna be a prime indicator for an air leak. I’d check compression before going further. If it’s still got good equal compression, do a leak down to find the air leak. 

[Johnson87]

Just rebuilt motor 120 compression and holds

[trickedcarbine]

Did you check compression after this happened?

[Johnson87]

Yes just checked it

[the boris]

Do leak down test and inspect all the boots for cracks and shit,also check the carburettors for clogs

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[the boris]

If compression is good than it's probably air/fuel mixture causing this

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[Johnson87]

Thanks guys I'll let you know tomorrow

[Pinkylee]

Pull carbs and check reeds !!!

[Johnson87]

Reeds are good boots and gaskets are good

[the boris]

Reeds are good boots and gaskets are good

Might be carburettors,something clogged one of the Jets or might be even fuel tap on the fuel tank,check it for flow

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[Johnson87]

Fuel tap flows fuel it's a dual tap for two lines

[rkooienga]

13 hours ago, the boris said:

Looks like fuel supply problem but did you check the compression?
What is the history of the bike,rebuild recently,any other issues before that happened?

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Im with boris on this one. If there is a crack in one of your fuel lines or one of the hose clamps fell off it would be sucking in air. I would check for a cracked fuel line first. That exact thing happened to my banshee. Secondly I would check for is that your jets are all cleaned out.  

You said the reeds and all the boots are good so I would say it has to be fuel. If you pour gas into the cylinder and it runs for a minute that means ints buning what fuel you had in there and whats coming through your fuel lines isnt enough to keep up. The only other thing I would suggest is to make sure the gas tank vent hose isnt kinked or has something over the end.

[the boris]

Im with boris on this one. If there is a crack in one of your fuel lines or one of the hose clamps fell off it would be sucking in air. I would check for a cracked fuel line first. That exact thing happened to my banshee. Secondly I would check for is that your jets are all cleaned out.  
You said the reeds and all the boots are good so I would say it has to be fuel. If you pour gas into the cylinder and it runs for a minute that means ints buning what fuel you had in there and whats coming through your fuel lines isnt enough to keep up. The only other thing I would suggest is to make sure the gas tank vent hose isnt kinked or has something over the end.

Never even thought about fuel tank vent,good catch.

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