Valve(s) bent? Any way to remove head w/o removing engine from frame?

Indydave

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The timing chain on my 79 750f must have slipped. I have retimed it, but it won't start so I will do a compression test but I'm almost certain there must have been damaged to the valves. I have spark and fuel but it will not fire. So I am wanting to remove the head in order to do a valve job, but I don't want to take the entire engine out of the frame. I am older and I would have a lot of trouble doing that even if I wanted to. So does anyone know if I could remove the head by itself? I can remove the exhaust header and that should free it up except that there is no clearance to lift it over the head bolts.
 

Indydave

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I just found this video and he has the head off without removing the engine but it is a single overhead cam cb500. It also appears that his frame might be curved to allow the clearance. Thoughts?

 
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