I have a 00 Blaster with a Leo Vince Exhaust on it. I just rebuilt the carb and put a stock main jet that came with the kit back into the bike. Is this going to cause the exhaust not to function properly??? The bike doesn't Idle unless choke is out, and when i give it gas it stalls out. I tried to turn the air screw all the way in but it keeps spinning. is that normal?? should it tighten?? if i turn it all the way to the left it stops but to the right it doesnt tighten. is that a problem?