Discussion

• Good XLFORUM threads on internal gear ratios by dave76 of the XLFORUM
  • https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-drivetrain/sportster-motorcycle-transmission-clutch-primary-secondary-drive/73714-4-speed-info?t=513989&highlight=speed
  • https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/frame-mount-evo-sportster-talk-1986-2003-models/142108-4-speed-trans?t=1539783&highlight=speed+trans