Quote:
Originally Posted by ProDigit
We now want to calculate our MPG gains.
If with our stock riding, we got 70MPG, mainly a mix of 3/4th city and suburbs, and 1/4th highway; our new MPG should come close to:
70MPG * 15/14 * 33/28 = 88MPG
The formula is derived from:
MPGstock * New front sprocket / stock front sprocket * stock rear sprocket / new rear sprocket)
We have gained an average of 18MPG compared to stock!!
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Sorry. This will have no basis in reality for fuel economy gains of that magnitude just from changing the gearing.