I have a 1974 Vepsa Piaggio CIAO and I took off the head and looked at the piston and the cylinder it is in. Both have rust on them and I couldnt move the piston. Maybe it is all the way down, I dont know. The bolt that runs through the clutch which apears to go all the way through to engine to start the engine after being peddaled, wont turn either. Can anyone PLEASE help me.