Carburetor diagram vacuum

Hi there,

Have you check the valves and the valve gaps?? Sometimes but not always having the wrong valve gaps can cause backfires. Have you also tried tweaking the carburetor to try and improve the idle??

Hey William,
By rebuilt, do you mean the carburetor?? ..or the engine??.. if you rebuilt the carb and you did not remove these screws ( and count the revolutions out from lightly seated), then you did not do the rebuild the carb correctly.. sorry.. What, exactly did you do to the carburetor?? Please reply on here to me..with details!!
thanks..

I cannot understand why someone that claims to have "rebuilt" a carburetor actually missed the BASCIS of carb rebuilding 090.. the air screw (the one on the angle toward the back of the carb has/is connected to the pilot jet system and the idle system, the passages that use this system must be perfectly clean for the engine to run properly.... the air screw has a spring. a spring seat and a o-ring for sealing on it.. the screw setting starts at 1 & 1/2 turns out from lightly seated.. then set the screw in the very side of the carburetor (its the one that controls the idle speed).. once you get the machine warmed up and cleaned out.. let it idle, turn the air screw in and out SLOWLY about a 1/4 turn at a time..EACH TIME ..waiting until the idle settles and then until you reach the point the machine idles as high as possible, then turn in it 1/8 of a turn.. then set the idle speed with the "side screw" to a speed you like... good luck...thanks!!

The idle adjustment screw on the carburetor usually has a spring on the shaft. Turn it counterclockwise to lower the idle speed. It probably won't shift because the gears are turning too fast...assuming that it's an automatic.

ATV Carburetor Idle Adjustment Fix - YouTube

? 1:27
www.youtube.com/watch?v=Xlagflm4ka0
Oct 28, 2012 - Uploaded by StopDropNRun
GIO Rebel t3 200cc Quad ATV Carburetor Idle Adjustment Fix Iadjust the carb idle screw ... Do you have another channel called pwns Jones?

Carburetor could be dirty or fuel filter clogged. Put a container of carburetor cleaner in your gas tank, fill it up, and run at idle for 5 minutes, see if that helps clear up the problem. Carburetor float could be stuck, or choke plate.

Most of the time it's because the Pilot/Idle jet is clogged in the carburetor. This most often happens because of old fuel sitting in the carburetor during long periods of sitting and non-use. The fuel forms a varnish - a gummy layer inside of your carburetor and clogs the tiny holes in the idle jet. Since fuel can't get through, the engine dies. The hole for the choke is larger, therefore the fuel can still get through it.

clogged carb jets Google Search

sounds like the carburetor needs cleaned and or rebuilt. or you could have a vacuum leak..

Hi,

You adjust the idle screw on the carburetor, to do this you will need to run the ATV, rev it and tweak the idle and throttle screws accordingly. Between revs you will need to adjust the idle screw and the throttle screw if needed.