Our first designs in 1974 used a single metering rod system. Simple, only one fuel circuit. It worked well for drag racing, where you're only tuning for wide-open throttle. But as Lectron carbs made their way into motocross, enduro, and trail riding, we quickly found the limit of that setup.

With a single fuel circuit, if your bottom end feels lean and you richen the rod, you’re also richening the entire throttle range—including the top. The result? Better low-end, but now your top end feels blubbery and/or drops a couple HP.

That’s why every modern Lectron carb uses at least two fuel circuits—the metering rod and a power jet—and PRO models use three. This lets you dial in each part of the throttle range independently, so you get crisp response at every RPM, not just the peak.

We didn’t stop at what worked in the '70s—we evolved it for the way people actually ride today.

Each Lectron carb is built and pre-set using the specs you provide. While we aim for true plug-and-play, engine condition and maintenance—like worn reeds, tired top ends, or leaking seals—can affect performance. Minor tuning is recommended after install to dial things in, but once it's set, it stays set. No jets. No guesswork.

Not at all. Lectron kits are designed for DIY installation and come with everything you need—including a throttle cable and any required parts for fitment. The PRO-SERIES and BILLETRON are directly adaptable to most OEM cables. No jetting, no specialty tools, and no need to take your bike to a shop. Bolt it on, dial in the idle, and you’re ready to ride.

Lectron carbs are built for riders who want simplicity without sacrificing performance. Spend your time riding, not tuning. Unlike Keihin or Mikuni, which rely on jets and constant tuning, Lectron uses a metering rod system that automatically adjusts fuel delivery based on engine demand, elevation, and weather conditions. No jets. No guessing.

We offer multiple product lines to suit each rider.

No matter which you choose, get the performance you want—without the tuning headaches.

We aren't in the game of one size fits most. OEMs design for mass production, cost targets, and broad rider use—not maximum performance or long-term adjustability. Lectron carbs are built for riders who want more: smoother power, zero jetting, and no tuning headaches.

At the core is our precision-machined metering rod, which adapts fuel delivery automatically based on throttle, load, and air conditions. It’s precision machined in-house to tolerances tighter than 0.0003”— roughly the thickness of a single human hair. Being out of spec by a mere human hair is the difference between a metering rod for a 250cc and one for a 700cc! This type of tolerancing must go through extensive testing for verification.

Collectively, this makes replicating the Lectron Metering Rod a high cost & considerable challenge.

Lectron carburetors are proudly designed, built, and tested in Texas, USA. Every unit is built in-house to ensure top-tier performance, quality control - and 98% of our materials are sourced from U.S. businesses. American made. Race Proven.

Yes. Lectron carbs are designed to adapt to common bolt-on modifications like pipes, reeds, and aftermarket heads. The metering rod automatically compensates for changes in airflow, so you typically won’t need to make any adjustments with slight mods. If you're going big bore or running a high-compression setup, let us know—we’ll tailor the setup accordingly.

The PRO-SERIES carburetors are highly adaptable to performance modifications and changes, including fuel. Material changes in air flow, compression, etc can be adjusted to in seconds with a quick turn of the torque jet or power jet.

We recommend your carb size based on engine displacement, stroke type (2-stroke or 4-stroke), and how you ride—trail, track, sand, or drag. You can also use your OEM carb model as a reference—our product listings include common replacements for Keihin, Mikuni, and others.

Need help? Just reach out. We’ll size it for you and make sure you get the right fit the first time.

We do not offer support for second-hand Lectron carburetors. Many used units have been modified, damaged, or are missing critical components—leading to poor performance and unnecessary frustration for both the rider and our tech team.

If you’ve purchased or plan to purchase a used Lectron, we offer a rebuild and authentication service to ensure the carb is functioning correctly and compatible with your bike. This is the only way to guarantee proper fitment and receive full support.

A lot of riders assume a bigger carb equals more power—but that’s dead wrong. The right carb size equals more power.

Think of it like a river: widening the flow before it narrows just creates turbulence, not speed. Oversized carbs reduce air velocity, weaken throttle response, and make your engine feel lazy off the bottom.

OEMs know this. Over the years, they’ve added things like Throttle Position Sensors (TPS) to compensate—not for the engine, but for the carb. TPS is often used to retard ignition timing at low RPMs, just to give the carb time to catch up because it lacks air velocity. It’s a workaround for poor fuel delivery, not a performance upgrade.

At Lectron, we don’t need band-aids. Our BILLETRON and PRO-SERIES carbs are tailored to your engine displacement, maintaining optimal air velocity and fuel control across the entire throttle range. That means stronger low-end, crisper response, and more usable power—without relying on the ECU to patch things up.

OEMs use a one-size-fits-most approach. The Keihin PWK38, for example, has been slapped on everything from 125cc to 500cc bikes. Do you really think all those engines should use the same carb?

At Lectron, we tailor the bore size to your specific engine displacement. That’s why our BILLETRON and PRO-SERIES carbs feel more responsive, more controlled, and more powerful—because they’re built for your bike, not the assembly line.