ever since i put my wiseco high dome piston lit in my 250x it hesitates once i nail into the gas from a low rpm, i was wondering since it changed my compression ratio to 12:1 and i am running 93 octane pump gas do i need to get a jet kit and pipe now or is there an adjustment on the carb that i could adjust?

 

i have that same problem but my carb needs to to be rebuild i'm just going to get another carb the 400ex carb. but i was told to go down a size on my pilot jet size 2. email me back i will tell you about my mods i'v done !