In the newer bikes it’s a 50A Maxi Blade type fuse - Bussman makes them, about $4.50 on Amazon. I always carry a spare fuse box in the trike along with spare relays (have fun finding a spare relay for those little miniature ones on the newer bikes - took me forevever - Harley doesn’t stock or sell them, the parts guys got crossed eyes when I asked). But if you get a starter relay or signal/light relay go out you’ll wish you had one.