2011 KTM 250 MXC Spitting Lots of Fuel Out Exhaust Pipe

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5/10/2018 10:15 AM
Edited Date/Time: 5/10/2018 10:17 AM

2011 KTM 250MXC with a 300cc cylinder kit

Worked on a lot of bikes .... especially 2 strokes but never seen something like this. Seems the fuel is flooding into the combustion chamber and not allowing the bike to start.
Havent tore into the bike yet just wanted to see if anyone had a similar problem so i know what things to look for.

Its my cousins bike he says it runs fine once he gets it started but its hard to get started. Strictly fuel (premix) coming out of the exhaust side of the cylinder. I know the first place im checking is the float but any other possible causes?


5/10/2018 10:53 AM

float sticking so clean the carb


5/10/2018 12:39 PM

Is it where the pipe meets the cylinder?


2017 RMZ450
2005 YZ250-sold :,(
1998 YZ250
2005 KX250F

80% of the time it works every time
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5/10/2018 7:22 PM

Yea mattyhamz when i turn it over just pushing the kickstarter down it literally squirts fuel out like seriously pissing


5/10/2018 7:25 PM

Lumpy is correct, float is stuck or the tip of the float seat is damaged and the fuel fills up the cases and eventually fills the pipe.