OK I put a 400 carb on my 300 a few months back we just put a 150 main in it @ 1st & everything seemed to be fine. WEnt tot he dunes & had to re jet to a 155 after a plug check down there. When we got home we checked it & it was STILL lean anyway so we put a 160 in it & of course that was WAYY to rich soooo now today I put a 155 back in & we are going to mess w/ the air/fuel mixture screw but what I'm wondering is...................................
I'm @ about 500' elevation, & am wondering what you guys w/ these carbs on thier 300's are jetted @ Where is your needle clip & air/fuel screw????
If anyone can help thanks