bad fuel was my first guess...
to be fair the bike is in very good condition all pipes still flexable and usable oil is getting there, could there be something wrong with the reed block? i fitted carbon reeds on it months ago just wondering if they have failed?
the knocking noise is a light sound coming from the topend - sounds like barings are shot
unfortunatly i dont have a wallet at min due to child, mortgage and the significant other dropping 2 days at work
ken