Question about 2001 KTM Exc-Racing E 520

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Fuel leaking from carburettor - 2001 KTM Exc-Racing E 520

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The most common issue with leaking fuel is the needle being stuck open. Usually this is from dirt or other foreign material getting into the fuel system.
Also, if your bike has been sitting for awhile, gas will gum up and clog the needle jet.
Your best bet is to remove and clean the carb.
Check to be sure fuel has not run into the crankcase and diluted your oil. If it has, change oil immediately. A good way to check is to open the oil fill plug and smell the opening.

Posted on Mar 11, 2009

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Posted on Jan 02, 2017

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Turn fuel on then off to start engine once engine running turn fuel on again.

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Yes Rick, try a couple of tricks I know.First,open the carburettor drain screw located at the base of the carburettor,this lets fuel flow out of the carburettor drain located next to/under it.(To acces this drain screw look between the engine cylinders from the LEFT of the bike)While the fuel is draining out,tap the fuel bowl.Next re-tighten the carby drain screw and see how that goes.I would suspect your bike has a vacumatic fuel tap that has 3 positions on it.1 marked on, 1 marked res, 1 marked pri.If the fuel leaks occur when in the on or res position this means part of your problem is a leaking diaphram in the fuel tap.Replace this & when engine isn't running,no fuel can flow to the carby when it's in the on or reserve positions.After ensuring the tap is ok, and trying the first trick,if it still leaks,well then you'll have to pull off the carby and give the needle and seat a clean.
Hope this healps Regards Andy Porrelli

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Try to solve this problem to gently tap on the carburettor bodies. If this doesn't help you have to clean out the carburettors, and/or replace the float neeldes

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