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What year did the YZ250 get an aluminum frame?


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Thinking of a YZ250 for a woods machine. Sorry if this has been asked before, but can someone tell me the first year the YZ250 got an aluminum frame and generally speaking what the weight difference was between the steel frame and aluminum frame YZ250?

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yeah 2005, but if you can the hot ticket is 2006+ when they added the SSS suspension. This "speed-sensitive" setup is regarded as the best suspension available on any stock bike, period. From MXA mag: http://www.motocrossactionmag.com/ME2/dirmod.asp?sid=&nm=&type=news&mod=News&mid=9A02E3B96F2A415ABC72CB5F516B4C10&tier=3&nid=0DC5F6E01BD44D5AA596E8F5ADAE40B7

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not sure about the porting... it may have been but something minor. I do know that the engine changes are extremely minor from 06 on, like on the 07 they changed the carb needle to N3EW, since engine R&D was frozen from 06 on.

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