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2003 rm125 bottom end

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Im planning on doing another rebuild on my 125 this winter and im not sure how to tell if the bottom end is bad. when i bought the bike about 3 months or so ago it still had the original piston in it and was in great shape even though i put a new wiseco in for insurance, the bike doesnt have very many hours and was never raced. when doin the last rebuild i noticed very slight side to side of the rod only and everything looked very clean. should i replace or not? id really rather save the money if possible but i dont want anything to happen either. i ride it decently hard but i dont race. any info is very appreciated thanks

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