Dax sells a part that I believe we are overlooking as a motored bicycle building community . Page 4 in parts . One of our major wishes is to use the bicycles gears . The problem is of course the drive shafts rotational direction on the motors available to us . We require a jack shaft setup to get the drive sprocket to the proper side to work with the bicycles geared rear end . or have the motor off on a precarious offset on the other side of the bike . This setup is for the "clone" engines . It is a "Power Take Off" . It not only has a gear reduction but it also changes the directional rotation or the drive shaft . This is a fairly wide bolt on though . It contains the centrifugal clutch and the gear reduction unit . .... D.J.