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2004 Cr125 burning up piston rings.

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Hello. I just recently put a new Wiseco piston kit in my Cr125 and after two rides the ring burn up. When i say "burn up" i mean there is no longer any compression, and the bike will no longer start. So i replaced the ring only and the bike was great. I went to the track yesterday and rode like two 20 min sessions and the ring is burnt up again.

My spark plug looks great, my fuel mixture is right, and the bike is not over heating.

Anybody know whats going on here? I'm not ordering any parts until i figure out whats wrong with this thing.

And does anyone think i should just go back to oem?

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Check your ring-end gap. I had similar problem on 00 cr125 with wiseco. Ring end gap was too small, once bike got hot, the gap closed completely and engine lost compression. If this is your problem, you will have to file down the ring to get accurate gap.

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