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Discussion Starter #1
Hello does anyone know what the bore size and piston size for a 1989 rm 125 2stroke is?
I have looked all over the internet and can’t find a damn thing I have one that needs a rebuild and don’t know quite what I need
 

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Discussion Starter #4
Okay so I pulled the stock piston and it has 54.94 and I’ve looked online would a 54.00 piston fit? and I’m guessing the .94 would come from the piston ring right ?
 
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