American Motorcycle Dealer AMD 245 December 2019 | Page 56

Lectron Fuel Systems - "Strong, Consistent Power"
Earlier this year Tucker Powersports announced the
addition of Lectron fuel systems to its list of offered
brands. Best known for making strong, consistent
power in sports like two-stroke motocross, enduro
and drag racing, Lectron is no stranger to the 4-
stroke market, and H-D kits in particular.
The American company began in 1974 by developing
what were then two carburetor firsts: the flat slide
and the flat metering rod. "Today, Lectron continues
to build upon these innovations and supplies both
professional racers and weekend riders with
technology that improves torque, horsepower and
fuel economy while adjusting for atmospheric
conditions." Under new ownership since 2010, the
product line has been expanded and production
processes refined.
Lectron carburetors are known for their simplicity,
with no jets, and what is said to be the least parts of
any carburettor. They compensate automatically for
a wide range of elevation and temperature changes
and have the only metering rod fuel system with two
circuits.
Lectron says its technology achieves better fuel
atomization as the fuel coming off the metering rod
is in much finer particles than fuel coming out of
a jet.
"This creates a much more efficient and even burn,
which helps make more power, uses less fuel,
decreases emissions and helps prevent fouling spark
plugs." The smooth, tapered bore design creates the
"fastest airspeeds of any carburetor, which means
improved throttle response. Unlike a choked down
keyhole design, Lectron products are designed to
flow the most air at the highest velocity and are the
only carburetors with the fuel pick-up tube always
under vacuum (on the engine side of the slide) - it's
always full of fuel, and adjusting float height for
throttle response is a thing of the past."
Carburetors
Lectron fuel system Harley carburetors are said to
provide superior throttle response and power
delivery by utilizing Lectron's patented metering rod.
Known for making huge power and being easy to
tune, Lectron has won more championships in drag
racing than any other carb manufacturer.
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
Lectron carburetor for H-D applications comes pre-
tuned from the factory, and once set up for riding
style and personal preference, they never need to be
touched again thanks to Lectron's metering rod.
Gen 2 Metering Rod
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 the fuel screw.
Lectron Power Jet
The Lectron 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 that the top end can
be independently adjusted without altering low
throttle response.
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. It 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, the fuel itself is easier to burn. The
result is better throttle response, fuel economy.
The Lectron Fuel Screw
The Lectron 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
PARTS AND ACCESSORIES
TUCKER V-TWIN
Fort Worth, Texas, USA
Tel: [phone]
www.tucker.com/v-twin
56
AMERICAN MOTORCYCLE DEALER - DECEMBER 2019
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