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Must Have Excel Spreadsheets

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If you are really into fine tuning your bike, and even modifying it, then one or more of these spreadsheets may be invaluable to you. They sure have for me which is the principle reason I created them. I used the crank balance calculator to make my 60cc motorized bicycle engine run smooth, made an expansion chamber for my Suzuki AX100 which was an especially hard feat since with its 4 gears it requires a longer pipe powerband in order to not fall "off the pipe", made my own squish design for my motorized bicycle engine, figured out which way to go with porting for various engines, and made a life-saver boost bottle for my AX100 which had a terrible power dip right before it came "on the pipe".

http://www.dragonfly75.com/moto/calculators.html

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