Because DIY tools are great to build I made this motorcycle balancing tool myself. It’s a simple construction using 4 bearings with metal shielding. The metal sheilding has te lowest friction especially is your grease them with penetrating oil. The bearings are mounted with stub bolts. The contruction is attached to my workbench using m6 inserts glued and wire cut in the wood. These metric inserts are also used to secure my sanding belt machine and same other tools. The balancing tool itself takes little space comparing to the solutions you’ll find in the hardware stores.
The cones are turned on a turning machine and secured on the axle with little inbus screws. To prevent unbalance in the tool I did set up the milling machine with centers and bolted the “to be cones” on the axle when creating the conus shaped sides. If you don’t, you might create unbalance when tightening the securing bolts in the cones.
If you like to know how to balance take a look at this youtube vid.