Originally Posted by tetertrux
Also, when I turned the mixture screw all the way in, it never affected the bike at all. It never died so I just backed it out 1.5 turns and left it.
The carb's leaking down and sucking fuel internally. Check to see how black the plugs are. You may have a heavy float or dirt in the carb bowl.
If you turn that needle in all the way and it doesn't falter or stall, then it's getting gas on it's own, cause that needle's turning off the gas, in reality, when turned all the way in.
That or someone has way too large of a pilot jet in it........