The quick assembly stark rods for Harley Davidson FX models from the years of construction 1985 to 1994 are designed for efficient and time-saving assembly. These bars enable the installation without disassembly of the upper rocker box, which significantly simplifies installation. The construction includes a shortened, conical pipe that ensures a robust and permanent performance. A double counter-mother security system ensures reliable fixation during operation. The scope of delivery also includes a special tool that facilitates the handling and adjustment of the bar rods.