I just had my 98 Srx 700 rebuilt and it runs great.. Idles perfect but when I take off it has no snap at all kinda stalls with slight bog.. Once it's going it accelerates nice just taking off is the problem.. I've adjusted the fuel screws on carbs from stock 1 1/8 turns all the way to two full turns out and this hasn't helped.. Carbs are clean, pilots and mains are clean.. Anyone have any other ideas what this could be? Power valves maybe? I'm stuck on what else to do..