back fire after carb. sync.on gs 1150

[matrix]

hi today I sync my carb. and when I finish it seems to do back fire

what should I do to remove those back fire (ajusting the fuel ???)

[Guest]

When does it backfire? On startup, when applying throttle, deceleration? Need to know to help diagnose.

[matrix]

ok

the bike does back fire on when I hold my speed (80 km/h at 4000rpm) then you can heard a little pow pow when back firing

just to let you know I didn't try to play with the mixture ( i think)

if I have turn the screws for air on the 4 carb.like the pic.

is my mixture is now bad?

if yes how can I correct that ?

[IMG]http://www.thegsresources.com/images/carbs/007_AIR%20SCREW%20LOCATION.jpg

[semerm]

Please check out my post about carb leaks I just posted. Are you sure the air box is on totally sealed?

[Guest]

Sounds like a lean condition either due to air leaks or lean pilot air screw adjustment. Do you have stock exhaust pipes? Airbox? Rejetted carbs?

[matrix]

no I have 4 in 1 , with standard (original) airbox , with all the answer everybody gives I'm goona check for a vaccum leak ,and i will cjeck my spark plug after my ride this afternoon

If i'ts lean do I have to turn clockwise or c-c-wise ?

which one do what ( clockwise give more air ,or the opposite)?

thank you

[Carter Turk]

Counter clockwise if you're trying to reduce a lean condition.

The bike probably is running lean if the jetting is stock and 4-1 pipe was added.

[matrix]

I talk with some guys at work and everyone says to do not touch my air screw cause I can burn my piston ( hot point)

they suggest me to go up in my pilot jet to have more gaz.

now I checked my air screw and I give 1 1/8 on each, do you think it's good ?