Depends how many tanks run through. it takes a few tanks to really improve. Remove the stinger and gut the muffler is a quick and cheap way to get more power.im new to the baja and i have only had it a day or so. i was wondering what size engine you have? is it 23cc or is it more. i am curious because i cant get mine to launch like that. i have the 23cc. is that why? should the 23cc still be fast off the line or is there always a little hesitation? your baja is impressive.