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Old 06-03-2008, 01:32 PM   #3 (permalink)
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Location: Germantown, WI
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CM400E - '81 Honda CM400E
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That is just his 5th gear set. The final drive ratio is the gear reduction that takes place at the differential. So, you'd have to swap in a new differential into the xA. Also, lower RPMs don't directly translate to better FE. It is all dependant on the engine design.
Current project: A better alternator delete
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