Hey guys new here. I have an 05 400ex bought it in the winter has a full yoshi exhaust, uni filter and a big gun rev box put in by the previous owner. Ran great in the cold all winter and during the warmer months it starts to pop and bog out and smokes a little. When I originally had the issue, I did the typical oil change, new plug and filter and adjusted the vagles which were pretty tight.

Wondering what size jets some of you may be running with a similar set up? Wanted to rule out jetting before I opened up the motor and checked guts out.

 

Anyone?