Motorcycle Transmission Hardware

MOTORCYCLE TRANSMISSION HARDWARE FOR HARLEY-DAVIDSON BUILDS

Transmission hardware is the category most builders leave until the end and then spend two hours hunting through hardware bins trying to find. Every bolt in this collection is a Colony Machine USA-made part spec'd to a specific Harley-Davidson year range and transmission configuration. Cover screws, mounting kits, mainshaft hardware, shifter hardware, and filler plugs are all here, organized by application across Big Twin and Sportster platforms from 1915 through current production.

TRANSMISSION COVER HARDWARE

The most commonly sourced items in this collection, covering both chrome dress-up and stock-replacement applications:

• Top Cover Allen Screws: Colony transmission top cover Allen screw kits for 1965 to 1978 Big Twin in chrome plated and CAD plated. The chrome version suits builds where the top cover hardware is visible and the finish direction is chrome throughout. CAD plated is the correct stock-replacement choice.

• Side Cover Hardware: Transmission side cover Allen screw kits for 1987 to 2006 FX/FL Softail and 1991 to 2005 Dyna. Separate shifter cover and speedometer sensor Allen screw kits for 1987 to 1997 FX/FL Softail. Long acorn side cover nuts for 1936 to 1984 Big Twin in chrome. Clutch arm cap nut kits for Big Twin 1936 to 1984 in both chrome and parkerized finish.

• Late Model Touring: Colony transmission side cover kit for 2017 and later Touring models for current-platform builds where OEM hardware has been lost or damaged.

• 4 Speed Side Cover: Transmission side cover and clutch arm nut kit for pre-1984 4 speed applications in parkerized finish.

MOUNTING AND MAINSHAFT HARDWARE

• Transmission Mounting Kits: Colony zinc-plated mounting kits for 1965 to early 1977 Big Twin and late 1977 to 1986 Big Twin. Two separate kits cover the change in mounting configuration that occurred mid-production. Confirm which kit applies to your specific year before ordering.

• Mainshaft Sprocket Nut: Colony mainshaft sprocket nut and lock kit for Sportster 1971 to 1984. Mainshaft bearing nut and lock tab for Big Twin 1936 to 1985. Both are platform-specific and not interchangeable across Big Twin and Sportster applications.

• Sprocket Shaft Bearing Retainer: Colony sprocket shaft bearing retainer with lip seal in standard size and 0.002-inch undersized for 1955 to 1968 Harley-Davidson 74-inch Big Twins. The undersized version is used when the case bore has been machined oversize during a previous rebuild.

• Transmission Filler Plug: Colony self-tapping transmission filler plug for 1936 to 1957 Big Twin. Covers the early-era gearbox where the original plug has been stripped or lost.

SHIFTER HARDWARE

• Shifter Shaft Bushings and Seal: Colony shifter shaft bushing and seal kit for 1952 to 1984 Harley-Davidson K, KH, XL, XLH, XLCH, XLS, and XLX. Covers the full Ironhead and early Evo Sportster span in a single kit.

• Shifter Linkage and Lever Kits: Shifter linkage mounting kit for 1975 to 1976 XLH/XLCH. Shift rod and shaft lever screw kit for 1951 to 1964 FL foot gear shift. Shifter lever stud for 1916 to 1936 Big Twins. The range extends back to early Harley production where hardware availability from other sources is essentially zero.

• Vintage 45 and Flathead: Shifter fork bushing lockwashers for 1935 to 1973 45-inch Twins. Oversized transmission bottom stud kit for 1926 to 1932 Singles and 45-inch applications. Browse the full Colony Machine catalog alongside complete transmissions and transmission components for gearbox rebuilds that go beyond hardware.