My son's 4wheeler

[Cowmilker]

The clutch on my son's Suzuki LT50 4 wheeler is locked up and it wont release. It wasn't running for a little while and I think someone (my brother in law) tried to push/pull it to start it by compression. I cleaned out the carb today and got it to start, but I had to prop it up so the wheels were off the ground as I was pulling on the cord. I ran it up and down the street a few times to see if the accelleration and deceleration would break the clutch free but it is still stuck. Does anyone know a trick to get it unstuck, before I have to take it somewhere? Does anyone know a good, cheap repair place?
Any hints would be appreciated! Thanks
Steve
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