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I have a 2001 r6, and Im thinking about doing a 2mm bore on the cylinders to bring it up to 637cc with a compression ratio of 13:1. I was wondering if anyone knows if i can run 91 pump gas with this compression ratio, also i was wondering what the life of the motor would be if i bored it out, any information on cam lobe settings and carb setting suggestions would be helpful.
 

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Interesting... I am not super knowledgeable on this technical stuff, but I think 91 octane would be fine. As far as the life of the motor, it all depends on how hard you thrash it.

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