Regards dangers, electrons, etc., remember -- an alternator delivers power based on the load. It doesn't just crank out a bunch more amps because you bolt it in.
I've had this argument with a few people over the years. Bumping up the amp rating of the alternator doesn't require any change to the balance of the electrical system IF the demand is NOT changing. If you do intend to add load, you need to make the pipes match the flow along the path to that load.
Generally, it's a good idea to replace the feed to the battery and the ground strap, as most loads get wired in downstream from the battery. If you increase the load from a component, for instance installing an 80w/100w headlamp, then you should upsize those supply and ground wires, and if the circuit lacks them, install fuses and relays.
A larger alternator operating at higher loads will generate more heat, but the location on the K allows for decent airflow, so cooling should not be an issue, at least not in my local climate. We seldom exceed 90f, one or two weeks in the summer we might see upper 90's or low 100's. The primary time for higher load is at night (lights) or in cold weather (heated gear), so extra heat from the alternator is compensated by cooler ambient temps.
I didn't do this out of need, I did it because I wanted to, and for the fun of creating the solution. Next project, how to convert a top case into a 12v beer cooler...
Like I always say, if it ain't broke, fix it 'til it is...