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Old 04-21-2012 | 04:42 AM
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Grinder
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Originally Posted by FaanP
Mr M.

I see you have a Keep-on that is modded. How does it compare to the M21?
The MM Keep On .21 is a great engine. Comparing to the M21, the MM Keep on .21 has similar bottom end, and top end to the M21. The MM Keep On has a little smoother mid-range hit than the M21. Both are very fast, reliable engines.
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