I talked to Ron while you were in IL this week. He is telling me to not port the head and run stock compression. As we all know, the Yamaha head is tougher to do and more $$$ for many reasons. I have so many questions I was just sitting here for a moment confused about were to start! The confusion comes from me talking to a GREAT tuner(you) and a GREAT motor builder(Ron) and asking the same question(What to do to get 55-58HP) and getting two pretty different recomendations. I know we are all learing about these newer 450's(me esspecially) but I thought I would get almost the same recomendations from you guys. The carb mod and the cams are the one thing we(you and Ron) agree on, oh yea, and good race fuel. The porting and the compression is were I get confused(happens pretty easy, lol). I took it upon myself to call Terry Varner...I got some kid that kept having to ask somone else every question I asked. The "kid" told me he would "start" the porting, but Terry USAULLY finishes it . I called Supertrapp....WOW, They didn't have a clue what I wanted. I asked for a ST slip on, and the said he has a dirttracker in the back, he'd ask him...he called me back and said the "dittracker" told him to tell me to buy a White Brothers pipe . Got know were there either. I told him I wanted a ST slip on for an Harley XR750...he said he would fax me his cataloge(which I never got) and I could buy what I needed . All I'm tring to do is make/build a nice ice racer to compete in the pro class and I'm feelin' like I am spinnin' my wheels..BIG TIME!! I have the money..I have the desire..I've lost 40lbs. to prepare to be a competitive flattracker/ice racer...I just need some direction. 48 HP aint gettin' 'er done in the pro class around here. I'm done babbling. Can ya help a dude out??