The last two nights when I go for a ride 5 mins into my entire bike shuts off. I take of the seat to check the fuses and the key switch fuse is blown. Luckily enough i carry spares, but why all of the sudden does this happen? I did do any mods i.e new blinkers, I know that the key switch call for a 15a fuse do I up it to a 20a? Any advice would be great I am just scared that I may be causing serious damage if I just ignore the problem and just keep changing the fuse.

2004 Xb12s Lightning