loncin 90 cc quad blows fuse

Not sure if this is the place to ask for help but here goes.I bought a loncin 90 cc quad off a buddy knowing the main fuse blows I hear the main fuse is 7amps the fuse that was blown in quad was unreadable so I'm sticking to 7 amps.I'm having hell of a time figuring it out I have a multimeter and have tested all wires for continuity no shorts that I can find yet.The battery is new, the starter was replaced also the starter relay solenoid before I purchased.Guess when buddies son took body off then back on it started to blow fuses.I'm thinking of replacing the handle bar push button starter switch and starter lockout safety switch. Any info would be appreciated

Mods* you move this to Maintenance if it's a more fitting place