1985 Honda Nighthawk 650 front brakes stuck after bleeding!

This bike sat in someones yard in the rain for years. Got it for $50 and have it running. Yesterday I drained all brake fluid from the master cylinder to the left side brake caliper. I bled it all out because I needed to clean the master cylinder of grime. Now the front brakes are locked and the wheel won't rotate. When I bled my Honda Shadow's brakes, atleast the front wheel moved if necessary during the process. Does anyone know what could be wrong? Are the brake calipers pistons stuck and need to be unpried? If so, can this be done without ordering new parts/o-rings? Was hoping to have this done today! Thanks in advance.

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