This advance unit is equipped with breaker weight that pivot on needle bearings

Five position cam style preload adjustment

4mm) up and 2" (51mm) outwards

Twin Cam) and 71-03 Sportster

PS Drop-in fork lowering kit, 41mm tubes 84-17 Softail; 88-13 FLT/Touring Top End Parts Panhead 1948-65 This advance unit is equippedDescription Drop your fork up to 2 inches in 30 minutes. No need to disassemble the forks, pulling the wheel or even changing the oil. The installation can be done without special tools. The Progressive Suspension shorter springs and the new secondary compensator springs makes this kit truly a drop in installation and, in contradiction to popular belief, actually improves the ride quality. Fitment 84 17 Softail; 88 13 FLT Touring (Excl. 02 05 FLT