1982 Honda CB450 nighthawk can't find neutral?

My cb450 has been getting harder and harder to find neutral. It's not that it skips it but it's physically hard to push the pedal to neutral. I changed the oil and messed with the clutch cable but didn't seem to make a difference. When the bike is off or moving it is relatively easy to get it into neutral but if it's running and stationary it's pretty much impossible to shift up or find neutral. Any ideas? Thanks! Also, if I need work on it if you k ow the price range for what I need that'd be awesome f you could include it!

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