None at all. As a matter of fact, at last years fall Tail of the Dragon, Chuk138 replaced a water pump in the parking lot in about 30 minutes.
The belt is easily removed, all that is required is a 17mm socket and wrench.
The water pump is easy also, just make sure you put the bolts back as they came out, they are different lengths and sizes.
Fill her up with Zerex G05 / distilled water 50/50.

HINT: If you remove the cooling fan first ( no tools required ), you will have plenty of room to work.