I think youve killed it... Andys was like that, seized solid. We played with it for a min, it restarted and ran ok -ish but no power. Got it back to my house and foudn the bottom cylinder was shafted. Bummer.
This is now the time you reach for the keys for the ever trusty RVF.. but im afraid in your case you sold it lol
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If I have to take the carbs off once more...