Thanks for your reply,I am a complete novice as far as Aermacchi is concerned !! I only have the engine at the moment , as it is a racing unit which is going to be restored together with all the rest of the bike, Eventually!! I am really after a parts or workshop manual to make sure that all the parts are there and all the settings,dimensions etc.The engine does look like the one in your photo .
Any help will be greatly appreciated.
Thanks again, Neale Didcock.
Sorry for delay in replying,but at the moment I'm not on the Internet.