2014 Trailmaster 150 dead and blowing cdi box
 

So this is gonna be a long story.

A friend of mine was in the backyard driving around and rolled it on its side. The motor cut. Okay no biggie. Righted it went to start it completely dead. After searching for possible causes I read threads say possible kill switch. Replaced it nothing. Ignition Switch replaced nothing. Found fuse was popped. Replaced fuse turned key pop. Okay looked for chafed wire nothing. Put a 20 amp fuse in melted cdi box. Okay maybe had a a bad box. Bought another and it keeps melting the box once you turn the key to the on position. I also discovered the 5 pin relay was sending a signal to the solenoid. So even without the 5 pin relay in it still keeps smoking the box. So what started out fun just driving my nephews gocart has turned into a dead buggy in my garage. Any tips would be most helpful..... Thanks in advance.

Bad short somewhere. 20 amp
fuse too big needs a 10 amp quick blow. Need to find a hot touching or pinched wires.