question about a carb?

[Josh_SLR]

I have a little pit bike that is a not running right.

what would make a bike run and idle fine but when i give it gas die out?

i just cleaned the carb and its still not running right any help would be greatly appreciated.

 

[SM610]

Is everything stock?

 

[Ironbutt]

clean the carb again

 

[Josh_SLR]

its spotless. can it be a jetting problem?

 

[Blade56]

I have a little pit bike that is a not running right.

what would make a bike run and idle fine but when i give it gas die out?

i just cleaned the carb and its still not running right any help would be greatly appreciated.

This usually means it is not getting fuel. One possibility is there may not be enough fuel in the bowl, another is the throttle slide or a plugged emulsion tube. Also check your pilot jet..

 

[Josh_SLR]

i will have to take it back apart and look again.

 

[Duffil]

could be a vacuum leak as well.

 

[sephy]

Carbs. So fun.
http://www.dansmc.com/carbs.htm
http://www.dansmc.com/carbs2.htm

The idle jet system (comprised of pilot air jet, pilot fuel jet and pilot fuel screw) controls from 0% to about 25% of the throttle opening. The throttle valve controls 0% to 35% of the throttle opening. The needle jet and jet needle control from 15% to 80% of the throttle opening and the main jet controls 60% to 100%. This means that when you open the throttle about one eighth of the way open, all of the gas/air mixture going into your engine is controlled by the idle jet. As you can see, the different jets over lap the operating range of each other. That is, the jet needle starts to effect things before the effect of the idle jet ends. This is something to remember when working on carbs... everything is interconnected. Change one thing and it will effect other things.

As much as I hate working on them, I love when I get them right.

 

[jake28]

Is the choke on?

 

[Josh_SLR]

i got the carb fixed. someone drilled out the main jet and it was twice as big as normal. bike runs like a champ now.