i have a 04 yfz 450 with the athena big bore kit 98 mm in it ans a hot rod stroker crank 3m . the clip is on the 4th mix screw is 2 1/2 out curtis sparks full exa. on take off it boggs the goes almost like it wants to cut off but after that it goes. i also have the tps bypass on it and a rev box. that has 6 settings.  please help any ideas would help me i' at the end of my rope and almost going to give up on this bike.  

bogging down is a sign that it is running too rich.

turning the fuel/air mixture screw to the right may help with this.

remove the airbox lid first and see if runs a little better.  

the air box lid is off. on the jetting i have a 45 / 182 is to high for the big bore kit. the head has been ported and polished also. someone stated in a raptor form that with a big bore and the head having work that you need to go to a smaller jetting do to it now sucks more air. is this true