put a 34 mm carb on my 2002 t.b. with ufo. starts find but when giving it throttle it bogs..... flutters ....... is the main jet to big ....... oh the t.b. has a rcr stage 1 kit....... it has a 230 jet maybe i need to try a 220 or 210 or 200 sound like to me jet to big????????? MODQUAD I WILL E-MAIL YOU OK...........................U THE MAN..........................................

 

Your main is way to big. You dont have the motor mods to handle that big of a jet. Try a 190 - 195. I run the same carb but with more mods and I run a 200 main and the plug looks perfect.

 

Curb, check your PM