hey guys, I got a 400ex bored to 426 11:1 comp. , HMF system, removed choke, Oversized valves, stage 2 hot cam, and uni filter with no lid. When i did all this I did a kind of debur and polish job on the head. well I have it tore all apart again to do some minor repairs and want to do a full port and polish job. can any one offer some info or some pics to help out with this so I dont destroy it??? Im used to porting car heads which I have done several times... so im not a newbee or idiot, but iv never messed with a 4 wheeler head, and dont really feel like messin up a perfectly good head. i am a very good visual learner so pics would be greatly appreciated, but any info would deffinantly help... such as where and how much to take off. thanks !!

 

sometimes you can see pics of port jobs on ebay