Gas Engine Conversion for Bikes, 4045mph, 100 mpg, No Ins No Tag, No Lic, $300 including bike, gas engine for bicycle, Motorized bicycle, bicycle with an attached motor used, peddle assist Bike Repair. Gas Engine Conversion for Bikes,40-45mph,100 mpg,No Ins No Tag,No Lic,$300 including bike,gas engine for bicycle,Motorized bicycle,bicycle with an attached motor used,pedal assist Bike Repair