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« on: February 03, 2010, 07:13:22 AM »
West,
You don't need to alter the displacement of a 2t 250 to hang with the 450's. If you keep it stock displacement you will still be able to compete in the 250 class as well. Last weekend at a local track there was a guy on a bone stock brand new yz250 and he was whooping up on some pro riders, and i don't mean local pro but PRO.
This is what I just did, pick up a 250 2t of your choice, strip it down and build it up from the ground up. Have a reputable shop (ie Reynard Modifications, Robert has extensive knowledge on 2t's and can make some SERIOUS power) completely build up your motor, get your suspension set up for your skill and weight and hit the track. I just finished doing this to my cr250, and the thing is amazing!!!! When all was said and done I had about the cost of a bran new bike in it, but this one is set up and customized to me and my riding. I am in it for about 2k labor 1,500 parts and 2k for the original bike, so for about $5,500 (these are rough figures) you have your race bike done. If you want to get crazy you could pick up a set of used A-kits and have them rebuilt and you would still be under the price of a new 4t.
Another thing to consider is that ,at least in the mid west, in the 30+ class alot of riders are carring about 30+ lbs with them as well, and weight robs hp and torque like a fat kid after cake!