08 trx 450 low end delay

[TaylorTRX]

My brothers 08 450 has had a bog at the snap of the throttle, he said it was always like that since it was new....he recently bought a slip on and is trying to narrow down what causes this....any hellp would be great

[hondaman450]

so he baught it brand new try to tinker with the fuel screw a little may not be getting the right fuel n air mixture it needs also u may try a dyno jet kit most dont like them but it made a big diffrence on mine cause mine was doing the same as urs also if u plan on keeping it stock try to see where the clip is on the needle and go from there hope this hlps they are way lean from factory should be the needle or the fuel air mixture