i built this recently. gets around 150 mpg and does around 35 mph. its great fun and great transportation and you can convert almost any bike to a motorized bicycle for less then $200.00. i also just started a new forum if you would like to join please take a look. here is a link Motor Bicycling Message Board Forum - Powered by vBulletin

picture of my motorized bicycle
http://farm3.static.flickr.com/2221/...857aed.jpg?v=0

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motorized bicycle! see what its all about