jetboat1971

Elevation is 0 to 500 ft and this problem is alot more than just no bootom end it wont idle worth a crap and no matter what jetting I have tried so far it seems to make no difference pilot jets I have tried are as foolows 30,32.5, and 35 and the mainis 340 and the needle I had one down from center and no difference and does timing really make that big of a difference

We have a 1993 banshee with a Vitos 404 kit and it has T-5's and 2into1 uni filter also V-force reeds and 21cc domes and the down fall is it has stock carbs and the jetting is 340 mains 25 pilot and it has toomey needles and we are running in the middle groove and our timing is stock so the problem is from idle to about half throttle it is boggy and unresponsive then from half to full it rips any help would be great thanks

Is there anyone who can help with getting this jetted or at least give me a good starting point? the engine is 68mm bore 10mm stroker with 38mm pwk's andthey have 5.5 slides in them also it has V-force reeds 21cc domes the stator plate is a +6.5 degrees of timing and I have Trinity stage 4 pipes