Hello group I have just purchased a 2004 Honda 400ex with a few modifications such as full white brother exhaust kit, slip on k&n air intake, and a hotcam upgrade.
The quad will not idel I purchased this quad from someone who lived on the coast and I'm at 4200 ft above sea level in central Oregon. I currently would like to get some basic information on where I should start with jetting and what size main jet should I start with and do I need to get the low end jet done as well. I am new to this but have a basic understanding of mechanic's thanks everyone for your help.

 

just purchase an dyna jet kit and with it has an wooksheet to work from it should have all the jetting and setting you will need

 

With the quad I purchased it came from the coast which was at sea level and I'm at 4300 above sea level do I do down in jetting on the port idle and go up in jetting for my main do I go up in size since it has upgraded hotcam and full white brothers exhaust?? Sorry new to running carburetors.