Interesting. I assume the two aluminum cones are not connected. In that case, it's a tool that is used to weld motor bike frames. The steering head of a bike has to be at an exact designed angle ("rake") for the bike to steer correctly. That can be done on a frame jig . First link *1) shows exactly how to build a frame from tubes. "Amateurs" however usually use something they attach to a flat surface or workbench when 'remaking' a motorcycle. (e.g. building a chopper). Link *2) shows how cutting up and reassembling the frame is done with a device almost identical to the picture above. As far as I know these tools are 'home brew' after some example. *3). The variations are endless and can be seen in the google results (choose 'images') of link *4).

Interesting. I assume the two aluminum cones are not connected. In that case, it's a tool that is used to weld motor bike frames. The steering head of a bike has to be at an exact designed angle ("rake") for the bike to steer correctly. That can be done on a frame jig . First link *1) shows exactly how to build a frame from tubes. "Amateurs" however usually use something they attach to a flat surface or workbench when 'remaking' a motorcycle. (e.g. building a chopper). Link *2) shows how cutting up and reassembling the frame is done with a device almost identical to the picture above. As far as I know these tools are 'home brew' after some example. *3). The variations are endless and can be seen in the google results (choose 'images') of link *4).

References:

http://www.custom-choppers-guide.com/rigid-sportster-frame-assembly.html (1)

http://www.hdforums.com/forum/sportster-models/706652-nightster-winter-makeov...

http://mechwerks.com/Jigparts.htm (3)

https://www.google.com/search?q=rake+alignment+tool+welding+frame (4)