Billet Proof Designs Chrome 1" Single-Cable Throttle Assembly for 1974–80 Harleys — nylon sleeve & knurled tension

Billet Proof Designs' chrome 1" single cable throttle assembly is a direct-fit replacement throttle clamp, housing and nylon sleeve for Harley 1" handlebars used on select 1974–1980 FX, Sportster, FLH and FLT models with a single external cable.

This complete assembly reproduces the original external-cable style found on many mid‑1970s Harleys, combining a chrome‑plated housing with a knurled return‑tension screw and a resilient nylon throttle sleeve. It installs on 1" handlebars and is made to the same form and function as the factory piece, giving a period‑correct look while restoring precise throttle action. Dimensions are compact for easy fitment: the full assembly measures about 5" by 2-5/8" and the nylon sleeve is approximately 4-1/2" long.

Will this throttle assembly fit my 1976 Wide Glide or Super Glide?

Yes—this single‑cable set is built specifically for 1" handlebars used on '74–'80 FX models, and for '75–'80 FLH and FLT models that use the single 1/4-20 external throttle cable. Check your handlebar diameter and cable style before ordering to confirm compatibility.

• Fits 1" handlebars on '74–'80 FX and Sportster models
• Also fits '75–'80 Electra Glide and Tour Glide with single external cable
• Requires a single 1/4-20 external throttle cable configuration

How does the knurled tension screw affect throttle feel?

The knurled return‑tension screw allows you to fine‑tune how much preload the throttle return spring provides, which helps eliminate slack and improves snap‑back. Adjusting this screw changes the return force without altering cable routing, giving a more consistent lever feel.

• Fine knurled head for easy thumb adjustments
• Adjusts throttle return preload quickly without tools
• Helps reduce free play and improves throttle responsiveness

What’s included and what are the assembly dimensions?

The kit ships as a complete clamp and housing with the chrome finish and a durable nylon sleeve—ready to install on the correct single‑cable Harleys. Overall and component dimensions make it easy to verify clearance and fit on period handlebars and replica bars.

• Complete assembly: ~5" x 2-5/8" including the tension screw
• Cable housing: ~2" x 1-7/8" x 3/4"
• Nylon sleeve: ~4-1/2" x 1-1/8" for smooth grip fitment

Can I use this with modern replacement grips or dual‑cable setups?

This part is intended for single external‑cable throttle systems; it pairs with modern grips that fit 1" handlebars, but it is not compatible with dual‑cable throttle configurations. Billet Proof Designs does offer separate kits for '81–'95 Big Twins and Sportsters with dual external cables.

• Compatible with most aftermarket grips for 1" bars
• Not for dual‑cable throttle systems—see separate kits for '81–'95 models
• Chrome plating maintains the classic factory appearance

Who is this for? Motorcyclists restoring or maintaining mid‑1970s Harley‑Davidson motorcycles who want a faithful, attractive replacement for worn or missing throttle housings will find this assembly ideal. It's aimed at restorers, custom builders keeping period‑correct hardware, and riders who want reliable single‑cable throttle performance with a classic chrome finish. If you ride a '74–'80 FX or Sportster, or a '75–'80 FLH/FLT with a single external cable and 1" bars, this is a straightforward, OEM‑style swap to restore throttle feel and appearance.