Motorcycle Repair: blowing fuse, suzuki gsxr 1100, main switch

Question
QUESTION: Hi, I was riding my bike the first time and my ignition fuse blown up (became full black) and the main switch was released too and the cdi box was damaged. I set another fuse other cdi box and it started again. But i went for a ride and than the same thing happened. What it be????

ANSWER: What is the make, model, year of the bike. Was any work done on the electrical system before it blew the fuse. What exactly do you mean by "the main switch was released" and what damage was done to the CDI box. I need this info before I can offer suggestions on what to do.

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QUESTION: It is a Suzuki gsxr 1100 of 1992. And there were no work done on it. The main switch that cuts of all the power of the motorcycle. I can't explain exactly what happened to the cdi box, but i tested it on a friend's bike and it didn't start his bike.

Answer
You probably have a short in the ignition wiring. A wire has probably worn through its sheath and the bare wires are touching the frame or another metal part, causing the fuse to blow. Check all the wires from the battery to the fusebox, the fusebox to the CDI and from the CDI to the ignition coil. Check the wiring at the ignition switch also.