You should have the older clutch set up in yours. My cfmoto clutching tread will have some info for you on roller size and general info. There is no gearing down persay. I think what your after is clutching changes. The Suzuki vinson has a very similar clutch set up and there should be plenty of info out there to Google. I have heard that the clutch kits for these fit the older cf500, but can't confirm this. The just of it is put lighter rollers in the primary clutch to move the RPM of the clutching up and increase the secondary spring pressure to quicken the backshifting. I can't tell you what to set everything at because I haven't worked on this model myself. There is an outfit in Estonia that has been doing some custom work on these on YouTube. Maybe check there too.