That's whatcha call one of them thar cheater dirt bikes with eye-talian cams and cross drilled brake lines.
The '03 motor had the head of choice...shame it is no longer available. Just wondered what the funky looking holes were for in the side of the airbox? The YZ airbox flows the best out of all the metrics and the holes in the side gain nothing...unless of course you just like looking at your filter!!
I made my S.O. name our home wireless network 2xitb. I love asking her what the password for 2xitb is
61hp if I recall right...I can put the graph up if you like.... The graph shows early '03 at 60hp...we improved some but they are with a stock, undrilled airbox which we found on the flow bench and dyno to breathe just fine. http://ronhamp.com/dynosheets/trice_welchyz2003.aspx