Pull plug wire off with your hand, it will only hurt for 3/10 of a second..
Just take bike for a ride a few different throttle positions. Ride at 1/4 thrtl. Does bike hold rpm?
Does it rev up or fall on its face, do that at half thrtl 3/4 thrtl, this will sorta help you find what
Circuit in carb is lean. Then you can adjust you needle to help get it back where it needs to be.
But you gotta read to know and understand what we are talking about.