Our motorcycle oil tanks feature three mounting points

a stock-style 22mm H-D style petcock (Left side when sitting on bike)

Nickle plated gas strainer is exact duplicate of OEM# 3623-32 used on 1932-38 Twins

These bungs are for 5/16" hardware

Complete transmission mounting kit contains parkerized PLAIN HEAD bolts and other stock hardware used on 1936-64 Big Twins

Heavy-Duty Fork Springs 1999-2005 Harley-Davidson FXD FXDC FXDL 2004-15 XL Models Subcategory_Transmission Components Our motorcycle oil tanks featureTired of your front end diving under braking or feeling harsh over bumps, especially if you're a heavier rider? These Heavy Duty Fork Springs from Progressive Suspension are the go to upgrade for a substantial improvement in ride quality and control. Progressive Rate Advantage: These springs are soft enough at the start of their travel to soak up small road bumps for a "plush" ride, yet become firmer as they compress to absorb the big, molar rattling