rm 125 gaskets

Is it necessary to replace the gaskets when changing the rings? The piston is all set because I only do trail riding, I just change the ring every 20 hours or so. This would be my first time doing it on a 2 stroke. Also, my bike has a 134 big bore kit, which I found out is a 56mm piston. So do i need a different gasket set?

It's always smart to replace any gaskets when you get into something, especially since it's relatively cheap. Not sure about different sizes but I think they should be the same, maybe someone with a big bore will verify.

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