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Message: [QUOTE="KX250Dad, post: 1131692, member: 74039"] As with the original post my son and I have been YZ125-RMZ250F-YZ250 and late season back to the YZ125. The YZ250 holds its own against the 450F's providing your in the right race class so that stays. Refurbished then sold the RMZ, and when racing the 125 given riders of somewhat equal skill they pulled, not pulled away... simply their technology advantage was noted... one of those you pull two bike I'll make up 1 in the turn/jump/in/out things. So, need a little help here... can I get a 144 "kit" to include all the trimmings, e.g, cylinder, piston, head, etc... for a 2003 YZ125 as once installed I'd send the OEM out? Should I [I]understand correctly [/I] can't race the144 bike in AMA mx amatuer "B" stock (taking a shot at Loretta's this year) although I did see the 144 2stk listed in the stock class. I can however run the 144 in the "B" mod class and I beleve the 250F's in this class are limited to the 250cc? Do I assume the OEM carb stays and simply tune the jetting? Can I assume the bottom can handle the additional pwr/trq? Will the 144 run with the OEM pipe system? If not some recommendations would be helpful. Given riders of equal skill in outdoor mx would the 144 pull with the 250F's in the higher gear sections (straights)? In 2007 how much grief from the 250F guys will we get when we show up with a 144 realizing it's AMA legal but racing at outlaw mx... anyone with experience? Thanks for the help men... [/QUOTE]

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