400x jetting 200main!?

Hey everyone I am brand new to these forums so sorry if questions like this get asked a lot but I have a question regarding my jetting on my 2014 trx400x. I bought the quad brand new and I’ve had the quad for about 3 weeks and the mods that have been done include a full big gun exhaust system, moose high flow air filter, and no air lid. All done by me. So knowing I have to rejet I’ve been working on it for the last couple of days to get it right doing plug chops at idle, low-mid range, and WOT. The main I’ve come up with is a 200 main. Everything smaller ….the quad tells me it’s lean by the way it runs, pops on decel, and plug being snow white. At 200 everything seems great and the quad runs like a beast. My question is does that sound right for the mods that I have. A 200 seems a little fat. Also I am running a 42 pilot and dyno jet adjustable needle on the 4th groove. I am at sea level. Any input is much appreciated.