ONENASTYNOTCH Posted March 27, 2013 Report Share Posted March 27, 2013 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 Quote Link to comment Share on other sites More sharing options...
Surfrjag Posted March 27, 2013 Report Share Posted March 27, 2013 Lets rule out electrical problems. Check grounds at coil and engine to frame and plug wires ends. Then find out if you have oem cdi and coil. Then i would find out about those needles.. maybe swap some stockers in to see if it changes anything Quote Link to comment Share on other sites More sharing options...
ONENASTYNOTCH Posted March 27, 2013 Author Report Share Posted March 27, 2013 guy said it ran mint before he did motor over its def a carberation issue Quote Link to comment Share on other sites More sharing options...
Surfrjag Posted March 28, 2013 Report Share Posted March 28, 2013 Are the carb slides backwards? Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted March 30, 2013 Report Share Posted March 30, 2013 Ha ha bro chuck wagon is the reason I started porting motors,if he could do it I felt anyone can.i live in seaford if you need help let me know I'm guessing you should pressure test the motor before you go any further he was notorious for reusing seals and I have been building motors more than a little bit,pm me and ill send you my number Quote Link to comment Share on other sites More sharing options...
sheerider11 Posted March 30, 2013 Report Share Posted March 30, 2013 Ha ha bro chuck wagon is the reason I started porting motors,if he could do it I felt anyone can.i live in seaford if you need help let me know I'm guessing you should pressure test the motor before you go any further he was notorious for reusing seals and I have been building motors more than a little bit,pm me and ill send you my number Do this. This is a guy you want to have in your phone book Quote Link to comment Share on other sites More sharing options...
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