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300ex top end rebuild

5991 Views 3 Replies 4 Participants Last post by  TRX2fiveO
Hello everybody.
Ok i have a few question rebuilding my 300ex. Its 2000 its never been rebuildt. First dose anyone know the piston size, jug size, and vlave size. i have never rebuildt a atv top end. so what do i need to do? I dont know if i want to keep it stock or put alittle more power in it. so if anyone can give me some pointers that would great.:icon_ peace::sad:
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