Transmission Adjuster Bolts

5 products

Transmission Adjuster Bolts for Harley-Davidson are the fasteners that set and maintain your gearbox alignment within the frame. Stocked by Iron City Motorcycles, an authorised Harley-Davidson dealer in Leeds, these bolts fit 45-inch Flatheads from 1929 and Big Twin four-speed models from 1936 to 1964. Colony provides precision-machined replacements in cadmium, chrome and zinc finishes that match the original factory hardware. Correct transmission alignment is essential for smooth shifting, reduced vibration and long drivetrain life, making these adjuster bolts a critical part of any vintage Harley gearbox service or frame-up restoration. Browse the full range below.