ONENASTYNOTCH

guy said it ran mint before he did motor over its def a carberation issue

4 mil stroker with ubkown porting stock carbs with pro design airfilter open lid motor has 22cc cool head 155 psi on a compression test ...im having a major stumble in the middle ....i have 27.5 pilots air screws at 2.5 great off bottonm but stumbles like crazy in the middle for almost 2 seconds befor it will acellerate ...i have 320 mains in it right now the richer i go on the mains the worse it gets ...it has dynojet needles im currently in the 3rd clip from top and the leaner i make it the better it gets ......im fixing this for a friend who got robbed of nearly 4500 dollars to put this thing together and they left it with stock needles 25 mains and 270 jets it wouldent rev at all with the lid on ......it was so lean it blew a hole clean thru the right side piston ...shop bandaided it back together and now im tryin to sort htis out .....ive had a bunch of banshees including a 4 mil very similar but with a set of cylinders done by a place in ny called chuckwagon racing....was an animal even with stock carbs ...i had pods on them with 380 and the dynojet needle full rich ..........can anyone point me in the right direction? thing is killing me ...thanx