mrorange Posted December 30, 2011 Report Share Posted December 30, 2011 I have a 2009 evo 125cc in mint condition and due to the poor part ex deals offered against a 200cc upgrade i wondered if anybody has converted a 125cc to a 200cc .If so is at more than changing piston and head or can 125 head be bored to 200,do the jets need changing and the million dollar question COST !!! Quote Link to comment Share on other sites More sharing options...
pindie Posted December 30, 2011 Report Share Posted December 30, 2011 I can't give a definitive answer but at a guess the 200 barrel would bolt straight on. What other mods would be required could be minimal or riddiculously complicated. It may be worth finding out what makes the 200 bigger than the 125. Is it piston height or barrel width? You may be able to get 200cc or near it by using a shorter piston. There would still be other work required though to get it right. Do you need a 200? Quote Link to comment Share on other sites More sharing options...
mcman56 Posted December 31, 2011 Report Share Posted December 31, 2011 The Beta 200 is a small bore 250, not a big bore 125 so you would have to swap the crank also. Quote Link to comment Share on other sites More sharing options...
pindie Posted December 31, 2011 Report Share Posted December 31, 2011 In that case you need a new bike if you need 200+ cc Quote Link to comment Share on other sites More sharing options...
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