First Post and ?

[Duckboy23]

This is my first post on here but I have to say you guys are a ton of info. My question is I've got an '04 450r with a 13t front sprocket, k&n filter with a 1" hole drilled in my airbox/lid still on. what jetting should i use? I've tried going to a 120 main but it cuts out in first gear. With the 125 that I now have in there it runs good but it seems a little rich. Any help would be great. Thanks.

[WhiteZee]

i doubt its rich with only a 125. you need to do a WOT throttle chop and look at the plug.