Our F5K is designed to fit on bikes fitted with our DD5 or Factory 5-Speed bikes We know bolt on kicker kits are nothing new Over the years many have come and gone for one common reason: they all relied on a ratchet hub or shaft extension that screwed on to the end of the mainshaft in place of the 3/4-16 nyloc jam nut They all eventually broke for the same reason The end of the mainshaft snapped off! The F5K kicker kits use a ratchet hub that presses onto the shank of the mainshaft, then the O.D. of the ratchet hub presses into the over-sized trap door bearing The ratchet hub is effectively located and secured from moving by the over-sized door bearing Will not clear factory exhaust Fuel Injection Models will need to be converted to carburetor TwinCam models will need an ignition retrofit to either a cam type sensor or a magneto Sold as a kit