Torque. Control. Simplicity.
The BILLETRON HD-X Series is purpose-built for Harley Davidson and similar large-displacement engines, delivering strong low-end torque, clean throttle response, and minimal tuning. The HD-X supports up to 96ci engines, while the HD-X+ is optimized for high-output builds up to 124ci with a custom larger bore for increased airflow.

With three precision fuel circuits — the externally adjustable Idle Fuel Control, Xcelerator™ Metering Rod, and Power Jet — this carburetor gives you total control over fuel delivery while remaining incredibly easy to set up and ride.

🏁 Who It’s For:

Street riders and builders who want bolt-on power, smooth control, and zero jetting hassle — whether you’re cruising a stock 96ci or pushing a 124ci big-bore build.