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ESR350r
01-11-2010, 05:43 PM
Trying to get my 2001 500cc scrambler figured out. It is leaking fuel out of the overflow, will not idle with out pressure on the throttle, and is back firing. When I shut the fuel off it will idle down and will run if I turn up the idle. I have pulled the carb off twice now and checked everything out and cleaned it. Everything looks fine. The float looks good and seems to be working properly. What am I missing?

rundrave
01-12-2010, 06:47 AM
sounds like something is sticking in the carb, needle or the float, have you done the carb mod from HPD?

come check out www.gen3usa.com that site is all about scramblers

ESR350r
01-12-2010, 07:51 AM
What is this carb mod that you are talking about?

rundrave
01-12-2010, 08:14 AM
For use with airbox lid removed or highly modified airbox.

Includes: CV Spring, Main jet, Needle Jet, drill bit and instructions.

It is $30 and makes a nice difference in throttle response

http://www.hpd-inc.com/500model.htm

another gain some guys have been doing is bolting in a carb from a predator with even better results

gen3usa
02-09-2010, 02:12 PM
either the float is sticking or the fuel needle and seat have gotten hard and no longer seal, you should start with checking the floats and making sure they dont hang up, if it still does it then get a fuel needle valve and seat.