Fit a 13T Freewheel to your Bomber. G9 old speed 70 rpm=27 mph. With 13T G9 speed 70 rpm=33 mph. Chain is SRAM 890.

Modifications to fit a 13T Freewheel. Work in Progress now being tested. Pic 54 shows 11T and 13T. Grind teeth off 11T and it becomes lock ring. Assembly held together with Locktite.

Goal is shown in Photos 1-13. 13T shown on bike in 14-22. Fit is good. Disassembly of Freewheel 23-55. Keep parts in 56 thats all you need. Prepare and Grind Freewheel in 58-63. Enlarge hole in tool to 11/16" Dia (left side) 64.