Need help I've looked everywhere and cant find any thing on this, here's what it is doing, when the bike is at an idle or about 1/8 throttle it only runs on the right side, and it backfires on the left side when you open the throttle up and let off, here's what we have tryed, synced the carbs, tryed whole different set of carbs, different coil, different stator,different reeds, adjusted needles up and down, changed all jets, and air screws, everything is spotless in the carbs, we also checked all the wire connections, what is the easiest way to do a pressure check? Its not the bike in the sig its a friends bike, Mods are, 300 main, 27.5 pilot, air screws 1.5 out, tors removed, k&n with airbox and lid removed, fmf fattys thats about it, he purchased the bike blown up and rebuilt it and it has never ran right, thanks in advance for the help!! ::