My cousin just picked up a zx6r 2008 we were told it was running rich it is blowing blue and black smoke, blew at idle black when riding and when it back fires its running a power commander 3 usb we are going to try the akrapovic map first to see if that helps if not than i am going to re-ring the old pistons and hone the cylinders and change the valve stem seals
Any advice would be handy can the job be done with the engine in the bike?
Cheers