I have a 2001 frame I got cheap and got a 04 engine with wiring harness with coil and a black box ( cdi ) guess the name. I have a aftermarket carb . Trying to figure out how this wiring works. I think I will look for a 04 on/ off stitch . Is there a wiring diagram somewhere to help me. Let me back up will a 04 engine fit in a 01 frame.