Did you know Lectron Fuel Systems built the first flat slide carburetor? Lectron has developed carburetors for over 40 years and has a rich history in the Harley world, including being OEM in the late ’70s. Introducing Lectron Fuel Systems Harley Carburetors. Known for making huge power and being easy to tune, Lectron has won more championships in drag racing than any other carb manufacturer. After proving its technology, Lectron began to refine its product and expand into new markets.
Recently, Lectron made its product more refined and user-friendly with the new Gen II 4 Stroke kits. These are equipped with a dedicated, externally adjustable, idle circuit to help get that low Harley idle, as well as custom metering rods for extremely smooth power on the street. The metering rod and externally adjustable Power Jet still takes the place of jets, needles, accelerator pumps, and other headaches. These kits now come as bolt-on units that are a direct replacement for your existing carburetors. Each HD carburetor comes pre-tuned from the factory, and once setup for your riding style and personal preference, you never have to touch them again, thanks to Lectron’s metering rod.
Lectron Metering Rod
The metering rod is similar to a needle in a traditional carburetor, but with the side facing the engine ground off. These are preset and do not get adjusted in Harley carburetors. The metering rod uses the vacuum from the engine to create a low-pressure signal behind the flat side of the rod (think about throwing a rock in a stream – the low-pressure area is directly behind the rock – then add vacuum to it).
Based on the density of the air, the proper amount of fuel will get pulled up the metering rod regardless of elevation, temperature, or humidity. Atmospheric conditions constantly change, but the physics stay the same. As a result, you always have the right tune. If you plan to ride from Florida to Colorado, the only tuning you may have to do is adjust your idle.
Another advantage of the metering rod is its ability to finely atomize the fuel. Fuel coming off the metering rod is in much finer particles than those coming out of a jet. Combined with always having the right tune (detailed above), the fuel itself is easier to burn. The result is better throttle response, fuel economy, and power, with riders having reported getting 40 more miles per tank.
The picture above shows the metering rod on a flow bench for demonstration purposes. Notice the metering rod is on the side of the slide that is always under vacuum. Fuel is always loaded in the pickup tube, which means you get excellent throttle response without an accelerator pump.
The fuel screw is an externally adjustable circuit that works with the idle screw to achieve the proper AFR at, and immediately off, idle. It is the main adjustment for low and closed throttle positions, and the feature allows Harleys to idle low and consistently. The screw is also helpful when adding basic modifications like a higher flowing air filter or aftermarket pipes that could create a lean condition like popping on deceleration. If that happens, simply open your fuel screw.
The power jet is the externally adjustable screw on the top of the carburetor. It works like a faucet (tighten it to restrict flow – lean out; loosen to increase flow – richen up). Once the slide rises above the bottom of the nozzle (about half throttle), the power jet is your main adjustment. This adjustment is essential for fine-tuning, so you can independently adjust your top end without altering your low throttle response.
Related: Lectron Fuel Systems Now Available from Tucker
Lectron Fuel Systems are proudly distributed in the United States by Tucker Powersports.
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