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wr250f 2002-2003 engine swap??

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Hi guys.. ive got a 2002 wr250f and the engine is in a bad way.. i want a bike with electric start (2003 and newer models do have this) so my options are to sell it and get a newer bike.. or to replace the 2002 engine with a 2003 engine with electric start.. - however this is dependent on the 2003 engine fitting my 2002 bike.... so my question is "can i stick a 2003 engine in my 2002 wr250f?"

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The rear motor mount that the swingarm bolt passes thru,is smaller on the 02 than it is on the 03.The oil tubes will line up fine.the 02 has a smaller crank,so the flywheels will have to remain w/ the respective bikes.The neutral switches are also different as well as the carbs.

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