Just to hopefully save someone else some time and trouble, the Kaoko throttle lock cannot be installed on HeliBars. Of course, nothing is impossible but the problem with this combination is that the step damper (bar end insert) is welded in on the HeliBars. The Kaoko kit that fits the F6B is model HND31 and you have to remove the inserts in order to install the Kaoko. Guess I'll stick with my aluminum GoCruise after all .