PRO SERIES Carburetor Kit for ATV's & Quads | Peak Performance & Ultimate Simplicity (38mm-40mm)

$899.99

Shipping calculated at checkout.

For Riders Who Want

Designed specifically for high-performance ATV and quad applications, the PRO SERIES Carburetor Kit delivers instant throttle response, strong low-end torque, and clean top-end power in a no-jetting, easy-to-install package. Machined from billet aluminum and paired with a chrome-plated brass slide, it’s built to withstand harsh off-road conditions while delivering smooth, predictable throttle control.

Equipped with a three-circuit fuel system — the Xcelerator Metering Rod, power jet, and torque jet — the PRO SERIES provides precise fuel delivery across the entire RPM range without requiring manual jet changes. Each kit includes an ATV-specific throttle cable (single or dual) for necessary function, and 4-Strokes include Custom Intake Manifold making this a complete performance upgrade for both single- and dual-cylinder.

Common ATV Applications;

Yamaha Banshee & Banshee Big Bore Kits
Yamaha YFZ 400
Yamaha Raptor 350
Honda TRX 400, TRX 250
Suzuki LT500R, YFZ 400
Kawasaki KFX 400

Applies to many more models as well. If unsure, please contact us directly.

Includes

Kit Includes

(1) Black Anodized PRO-SERIES ATV Carburetor Setup for Vehicle
(1) ATV Throttle Cable (dual or single)
(1) Custom Intake Manifold (4-Stroke Only)
(2) Lectron stickers
(1) PRO-SERIES Tuning Guide

Description Features + Compatability Chart Specs FAQ

PRO SERIES Carburetor Kit for ATV's & Quads | Peak Performance & Ultimate Simplicity (38mm-40mm)

$899.99

Built for performance. Tuned for the trail.
The PRO SERIES ATV Carburetor Kit delivers instant throttle response, crisp power, and true bolt-on simplicity — no jetting required. Designed for single-cylinder and dual-cylinder ATV engines, this kit includes a chrome-plated brass slide for ultra-smooth throttle pull, plus an ATV-specific throttle cable (included when needed for proper function).

🏁 Who It’s For:
ATV riders who want reliable, tunable performance and smooth control — from dunes to trails to technical climbs. Whether you're riding a single- or twin-cylinder setup, the PRO SERIES makes performance easy. Common applications include; Yamaha Banshee, Honda TRX, Yamaha YFZ 450, Suzuki LTZ 400, Suzuki LT500R, Kawasaki KFX 400.

Xcelerator Metering Rod

Provides a burst of fuel enrichment when ‘whacking’ the throttle for instant throttle response in all RPM’s. This innovation is a leap in metering rod technology by sustaining the hassle-free, no jetting benefits, while leveling up performance and throttle response. No compromise, just power made easy.

Torque Jet Technology + Power Jet System

The PRO-SERIES combines our newly designed Torque Jet Technology in addition to the Power Jet System. Designed to deliver power exactly where you need it — the bottom-end grunt and wide-open throttle performance is unrivaled. The torque jet design activates at low throttle openings to improve off-idle response and drive out of corners, while the power jet kicks in at higher RPMs to maintain strong top-end fueling without bog or drop-off.

Together, these two circuits and the Xcelerator Metering Rod create an incredibly responsive throttle at all RPM and put real power to the ground without hesitation. Whether you're trail riding, racing MX, or pushing through deep sand, the PRO-SERIES is designed for performance, and delivers.

Internal Fuel Circuits

Fully optimized internal fuel circuit routing, meaning the power jet and torque jet systems are fed through machined passages inside the carburetor body — not external hoses. These fuel passages have been designed to expedite fuel delivery by reducing the required vacuum necessary to pull fuel through each circuit and also shortens the fuel travel path which allows for near immediate fuel delivery. The result, a noticeably quicker throttle response and immediate power transfer to the ground.

By eliminating external fuel hoses, the PRO-SERIES not only looks cleaner but is also easier to install and less prone to hose-related damage in harsh riding conditions.

Chrome Plated Brass 'H' Slide

Throttle feel starts at the slide — and this one’s built to deliver. The chrome-plated brass ‘H’ slide adds durable mass for a more stable, weighted response, while the chrome finish drastically reduces friction to prevent sticking or galling under heat.

The result? A buttery-smooth throttle pull that stays consistent, even in the harshest conditions.

Don’t settle for flimsy or grabby. Feel the difference. Ride smoother.

Redirect Slide Ramp

Designed exclusively for our PRO-SERIES & BILLETRON carburetors, this unique slide design does more than control throttle - it redirects airflow to sharpen the fuel signal, delivering quicker, cleaner throttle response and more consistent power delivery across the rev range.

SafeDrain Overflow Bowl

SafeDrain is Lectron’s integrated overflow control system engineered to protect your engine from the complications of fuel overflow in the most demanding conditions. Whether you're navigating steep climbs, hammering through vibration-heavy terrain, or transporting a hot bike after a ride, SafeDrain gives excess fuel a clean exit path and enhanced geometry for improved sealing.

By combining overflow redirection with added venting for incline and decline situations, SafeDrain Bowl ensures stable fuel pressure and consistent performance where other systems fail. It’s peace of mind built into the bowl — no tuning, no fuss, just protection you can trust.

… …

I would have to say that it is one of the best performance bolt on's that I have purchased in a l...

Recently purchased the Lectron Billetron PRO-Series carburetor and I would have to say that it is one of the best performance bolt ons that I have purchased in a long time. From the tuning right out of the box to the way it makes my motor about pull my arms out of there sockets when Im getting on the gas, hands down the best carb on the market I would purchase all over again before any other brand of carb.

PRO SERIES Carburetor Kit for ATV's & Quads | Peak Performance & Ultimate Simplicity (38mm-40mm)