Honda vf750 front brake problem
 

just bought this magna vf750. didn't have any problems with the brakes loading, but now the front brakes are locked up. I opened up the brake fluid container up by the right grip, and then I could move the front wheel/roll the bike in neutral. Today I went back out and now it's locked again. I did the same thing today, no luck. Is it possible that it's so hot outside that it's forcing expansion in the lines and now it's stuck?

I am pretty new to bikes, so I don't really know much more than how to ride. I bought this bike after it was rebuilt to get a ready to go rider, not a project.

Anyone else had this problem/know what I can do? I was hoping to ride back home to my parents tomorrow but it sure looks like that won't be happening now.