[kennedy759]

82 450 nighthawk, been sitting for awhile, clutch will not disengage, its not running yet, either the disks are rusted together or glued with old oil, anything I can put in the crankcase to loosen it up? I just drained the old oil so the crankcase is empty.

 

[66Sprint]

Your hands..... Mechanical/physical separation (disassembly, clean and re-oil, reassembly) is the correct method of curing the "dried oil" problem....
There ARE other methods however......

 

[kennedy759]

it just came loose from putting it in gear, pulling clutch lever and pushing the bike. once I get it running then will look further into the clutch condition, maybe.

 

[66Sprint]

Yep, That's one of the "other" methods, but you risk (albeit only slightly) damaging the friction plates that way......