hi there
ive been tryng to take the chain sprocket of my blade engine so i can put on my propshaft adaptor on but no succes what is the best way to do it?
cheers

An impact gun would be the ideal way if you have access to a compressor, if not you can hire battery operated ones from HSS hire etc for about £10 a day.

Jam the sprocket against the engine with metal things, Use a 6 sidded socket and a 2ft breaker bar

If you have no further use for the sprocket then you could use a piece of wood inbetween sprocket and block which the teeth can bite into and shouldn't damage block. Then big bar, job done.