Ahh, its been awhile for me but.
I have been to san fran, the only place to rent bikes there is easy rider, so get yourself a hog and cruze around. I spcifically did a bit of hwy 1, but had the most fun running aournd maerrin county, just over the golden gate. Also I cruzed along some bay hugging roads out of susalito, awesome. There is a bay area forum that is listed in the N. Cali section SBN, check that out, it lists everything.