I have decided that the 4th version of the Red Hornet would be my trusty old HS mated to an internally geared Shimano Nexus hub. Since motorized bicycle engines are left hand drive and hubs are right hand drive, I need a jackshaft to transfer power. The HS engine mount that comes with kits is large and bulky and would interfere with the drive line for my left hand chain, so I fabricated this engine mount which is open in the rear and provides a clear drive line for the primary drive chain. It's made from one piece of 1" x 1/2" x 5.5" steel welded to a steel plate drilled to match the mounting holes on the bottom of the HS case. Each end of the mount is drilled and tapped so a bolt can be used to connect the mount to Kuryakyn-type clamps. The mount is very solid and simplifies installation of the engine. I am currently making the jackshaft from two 5/8" pillow block bearings and a 10" x 5/8" threaded and keyed shaft. The jackshaft will be mounted to the downpost using a large aluminum CB antennae mount. I will post photos as the project progresses. I'm hoping the HS and 3 or 4-speed hub will make the bike more practical with good take off and resonable top end. I also have a Sram Automatix 2-speed hub that I might lace up for the project if I can figure out how to purchase Cesur's disc brake adapter. The automatic would be legal, the 4 speed would not be.
Attachments
-
405.3 KB Views: 581
-
420.8 KB Views: 1,678
-
428.7 KB Views: 455