0Use A Metronome and Slow Down Again
If you can’t play a song in time, then you can’t play the song. “Flight of the Bumblebee” is played, depending on how you count it, at about 500bpm.
But do not start trying to learn the song at 500bpm. Start at 50bpm. When you can play it at 50, speed it up to 60, and so forth until you can play at the correct speed.
