This is to all my Banshee motor heads. I recently picked up a 2000 and it has a whole bunch of stuff done to it. Noss machine aluminum head, not sure what domes, supposedly it's bored, not sure what crank, tors removed, fmf fatty pipes, stock carbs with 280 mains, reed spacers, boost bottle, toomey intake, and vp 110 octane. And it runs like a raped ape! But... At idle it has a almost tapping/ light knocking. It sounds like it coming from the top end. Is this sound normal for a bike that has been modded?