Top end was just rebuilt along with pro circuit exhaust and reeds. Was jetted correctly (i think) ran great for the first hour or two. barely any smoke and ran top. towards end of day plug was getting wet. blowing a little more smoke than usual at wot. fouls plug, wait a half hour or so bike starts back up and runs perfectly.

Do i need to rejet after top end is broken in? run hotter plug? any suggestions

 

are you using pre mix or oiler? (I suspect oiler)
have you done an appropriate plug check?

 

Verify that you have the proper plug was also the first thought that came to my mind. Heat range plays a major factor in an application like that.

You said more smoke, was it a heavy oil smoke(blue) or a heavy fuel smoke?

 

it was more of a blue smoke. i mix only honda 2r oil and 93 octane 32:1
i will try a hotter plug and if not I assume it will just have to be re jetted.
gas was getting to bottom of tank possibly settled oil playing a factor

 

Cr dirtbikes are always fouling, when you kick dont give as much gas and it will stop. Also how much did you pay for your spark
Plug?