you need honeing tools, its not as easy as it sounds. u aslo need a flow jet to make sure your adding power and not degrading performance. it will cost u about $300 bucks for someone to port and polish the head at any bike shop. if they want more, tell them they can....well u know. u will proably have to take the head off and leave the valves on and take it to them. if you want to do something yourself, get a dremel and only polish the ports...will add a little better flow to the engine...probably not enough to notice. sorry if this is not what u wanted to hear.