forget that! I've been seriously considering either a v4 1000, using cr250 heads or a v-twin 1000 using 500 heads. I have a source with engine design experience, who also has the Optimum engine software, of QUB Optimum who used to run McWilliams in 250's... Any donations of relevant engine parts to measure greatly appreciated!
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NSR300R - Why did i ever have a 250...