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Old 08-07-2010, 10:47 AM   #56
Easy Rider
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Join Date: May 2007
Location: Champaign, Illinois
Posts: 4,561
Re: Needle shim modification

Quote:
Originally Posted by emory70
if anything, there should be an increase in gas mileage. if it decreases, i would wager that it's because the new power encourages more aggressive riding.
No doubt that's part of it but making the mixture RICHER and allowing more of that richer mixture to "flow" through the engine pretty much automatically means that you are gonna use more gas in the process.

None of the changes described here makes the engine any more efficient.
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