Not completed in photo... but tested with auxiliary pipe and tank => this unit will likely do 50mph! Sturmey Archer [functional 3 speed]. Works like a charm! To install jesse james tank [made functional] and XXL drag pipe...
http://i740.photobucket.com/albums/xx43/assemsvc/freedom%20girl%201/DSC07898_zps0e09e751.jpg
http://i740.photobucket.com/albums/xx43/assemsvc/freedom%20girl%201/DSC07898_zps0e09e751.jpg