BILLETRON HD-X & HD-X+ Carburetors | Give Your Harley or Street Bike an Upgrade

Big torque, crisp throttle, and zero hassle—HD-X carbs are the upgrade your bike was built for.

HIGHLIGHTS SUMMARY

⚡ XCELERATOR Rod — Instant response without hesitation, even at low RPMs
🎚️ Idle Fuel Control Circuit – Externally adjustable idle screw controls Idle speed RPM without disassembly
🔃 Chrome-Brass Plated Slide — Reduces friction for buttery-smooth throttle pull
🌄 Auto Elevation Compensation – Performs with swings in altitude, no tuning needed
🔧 Set It & Forget It – No brass jets, no constant tuning — just ride

FULL HIGHLIGHTS

Xcelerator Metering Rod

Instant Response. No Bog. All Throttle.

Designed to mimic an accelerator pump—without the complexity—the Xcelerator Metering Rod delivers fuel precisely when you need it. Whether you’re rolling it on or whacking it wide open, this circuit reacts instantly for throttle response you didn’t think a carb could deliver.

Idle Fuel Control Circuit

Dial in Idle. In Seconds.

This externally adjustable circuit lets you fine-tune your idle RPM without pulling the carb or turning off the bike. Whether you're chasing the perfect start or calming down a flameout-prone setup, precise idle control is just a turn away.

Chrome-Brass Plated Slide

Silky Feel. Built to Last.

A chrome-plated brass slide delivers smooth, low-friction throttle modulation with unmatched durability. It’s designed to resist sticking and wear—so your throttle feels fresh every ride.

Set It & Forget It

Lectron metering rods are precision machined to tolerances of .0003" - roughly the thickness of one human hair. Our technology automatically compensates for changes in elevation, temperature, and humidity—no jets to swap, no guesswork. Whether you're riding sea level sand or high-elevation singletrack, you’ll get clean, consistent performance every time you start your bike.

Billet Aluminum Construction

Stronger. Lighter. Built to Perform.

Machined from solid billet aluminum, this body delivers superior strength, tighter tolerances, and a premium finish. It’s lighter, tougher than plastic, and designed to withstand heat, vibration, and abuse—ride after ride.