'05 450r jetting question

[sparky76]

i've got a mostly stock 05 450r with only an HRC airbox and a LRD PRO4 slip-on. I just checked the jetting (I bought it used and didn't know what was in the carb) and found a 175 (kehin) main with a 48 pilot jet. The reason I checked is the motor likes to backfire on deceleration. Does this sound normal, or should I bump the pilot to a 50. thanks-oh i live in st. louis for elevation purposes. thanks.

[lafinrat]

50-52 pilot, 175-185 main. make sure the pipe doesn't leak at the head--that'll cause a decel pop also

[911]

screw out the air screw (front of bowl on bottom) 1/4 turn at a time this will stop the backfire or POPPING;)