WATCH VIDEO: HOW TO INSTALL EXTENDED FORK TUBES ON YOUR HARLEY For example if you are doing +6 over, you cut the PVC to 6 inches, +4 over you cut to 4 inches and so on. HOW DO YOU EXTEND A HARLEY FRONT END? WE'LL SHOW YOU.īrian Radmond of Geared Science gives you and easy step by step tutorial on how to extend your fork tubes and give your Harley-Davidson a more aggressive chopper style stance.Įditor's Note: These tubes do not come with PVC pipe inserts, if you need them use 5/8” PVC and cut to whatever extension your tubes are.