From my experience, I can tell you - to get the actuator out, use heat. put the actuator end (the flat side) in a vice and heat it up with map gas real good. With it being in the vice, you can grab the housing (use gloves) and twist and pull while heating. Once out, wire wheel it and lube it up really good with grease or never-seize. be sure to clean all the rust out of the hole and you shouldn't have many problems moving forward.
Anytime you have steel frozen to aluminum, use heat (aluminum expands much faster than steel) and some tapping. Use a dead blow, and be careful not to break the aluminum, but use enough force to get your job done.
RIP - Yamahondaman!! You will never be forgotten!
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