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So as someone prepping a bike for track days I have a question about the chain. My buddy just bought a race prepped 250 with a 520 chain but non O-ring and you can feel there is a lot less resistance. So on a bike dedicated just for the track would the 415 or a non o-ring be the best bet? Also on the non O-ring whats the best method to keep it lubricated? Thanks!
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