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BILLETRON Carburetor Kit for ATV & Quad | Quick, Responsive, & Simple (29mm, 38mm, 40mm)

Name: BILLETRON Carburetor Kit for ATV & Quad | Quick, Responsive, & Simple (29mm, 38mm, 40mm)
Brand: Lectron Fuel Systems
SKU: 1800-B
Price: 699.0 USD
Availability: InStock

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69900

For Riders Who Want

Built from billet aluminum with a chrome-plated brass slide, the BILLETRON ATV Carburetor Kit delivers smooth, reliable performance with minimal tuning. Its two-circuit fuel system — featuring the Xcelerator Metering Rod and power jet — offers strong low-end torque and clean top-end power in a set-it-and-forget-it package.

Available in 29mm, 38mm, and 40mm for single-cylinder engines and twins, each kit includes an ATV-specific throttle assembly and cable when needed for function. Simple to install, easy to ride, and built for the trail.

Title

Qty

Common ATV's;

Yamaha Banshee 350 & Big Bore Kits
Honda ATC 250R, TRX 250R, TRX 450R
Suzuki LT 500R, LT 250R
Arctic Cat DVX 400
Polaris Trail Blazer 250

Applies to many more, if unsure, please contact us directly.

Includes

Each kit comes with the following;

(1) BILLETRON Carburetor and setup for your vehicle
(2) Lectron Stickers
(1) Tuning and Installation Guide

Simple tuning. Serious performance.
The BILLETRON ATV Carburetor Kit is built for riders who want reliable performance without constant jetting or tuning. Designed for modern 4-stroke ATV engines, it features our Xcelerator metering rod and power jet system for smooth power delivery from low-end torque to wide-open throttle.

Available in 38mm and 40mm sizes for single-cylinder engines, and in a 29mm dual-cylinder MINI version for smaller displacement twins, the BILLETRON offers a no-fuss upgrade that improves throttle control, responsiveness, and overall rideability — especially in technical or high-traction terrain.

🏁 Who It’s For:
ATV and quad riders who want set-it-and-ride simplicity, linear throttle control, and clean performance — from single-cylinder 4-strokes to small-bore dual-cylinder setups. Common applications; Yamaha Banshee, Honda ATC 250, Honda TRX 450, Suzuki LT500R, Suzuki LT250R, Polaris Trail Blazer 250 and many more!

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.

Power Jet System

Adds external adjustability of fuel for wide-open throttle positions. Fine tune your top end for increased power without sacrificing midrange - Ideal for racing and high-speed performance.

Tailored Bore Design

Unlike one-size-fits-most OEM carbs, our bore is precision-tailored to match your engine's air volume for sharper throttle response and better power delivery.

It's like a well fitted suit vs one from your dad's closet - mass applied sizing doesn't cut it.

Avoid the pitfalls of generic carbs. Get fitted.

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.

Carb Sizes: Which One is Right?

BILLETRON MINI 29mm

83mm Overall Length
35mm OD Spigot (engine side)
50mm OD Bell (Airbox side)

The BILLETRON MINI 29mm is built for 85cc–112cc 2-stroke engines and offers a direct performance upgrade over most 28–30mm OEM carburetors. With smoother power delivery, improved fuel efficiency, and no jetting required, it’s a favorite for riders who want a “set it and forget it” carb that delivers race-ready performance.

Common OEM carbs replaced:

Keihin PWK 26
Keihin PWK 28
Mikuni TM 26
Mikuni TM 28
Other 28mm–30mm stock carbs

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FAQ

+ What's the difference between Lectron carbs and stock/OEM carbs?

Lectron carbs are built for riders who want simplicity without compromising performance.

Unlike stock carbs that rely on jets and constant tuning, Lectron uses a metering rod system that automatically adjusts fuel delivery based the conditions around you (elevation, temperature, humidity, etc..) . No jets to swap. No guessing. Just ride.

Here’s what sets us apart:

No Jetting Required – Adapts to changes in altitude, temperature, and mods automatically.
Smooth, Predictable Power – Strong bottom-end and midrange torque with linear throttle response.
Fewer Parts, Less Tuning – Simpler design means less time wrenching and more time riding.
Built for Performance – Whether you're racing or trail riding, you get better performance without the hassle.

It’s the performance you want, with the simplicity you’ve been missing.

+ What's the difference between the PRO-SERIES, BILLETRON, and H-SERIES?

Each series is designed for different rider needs and budgets:

PRO-SERIES: Our top-tier carburetor. Fully billet-machined with features like the Torque Jet, Power Jet, Xcelerator metering rod, internal fuel routing and a bore matched to your engine size. Built for serious riders who want maximum performance and tuning flexibility.
BILLETRON: Still billet-machined, but simplified for the rider who isn't looking to tinker with fine tuning. It uses just the Power Jet and Xcelerator rod for a more linear, predictable power-band but still provides excellent acceleration. Great for riders who want performance without constant tuning.
H-Series: Cast aluminum and fixed at 38mm, this is our value option. Simple to install, easy to tune, and ideal for riders who want better top-end power without breaking the bank.

All three perform great — it comes down to how much adjustability and performance you want, and how much you're riding.

+ Will the carb come pre-tuned?

We have over 50 years of experience with tuning carburetors. We setup each carb to a fundamentally determined setting based on information you provide to us. Your carb will be very close or spot on when received. With that said, varying factors like the bikes condition, wear, maintenance, oil ratio, and age of fuel can have an effect with tuning. We suggest a simple, slight tuning at install to achieve max performance and preferability. Once you set it, forget it. Enjoy no-hassle.

+ What if I need help with install or tuning?

No problem - we've got you covered. Our dedicated support team has extensive experience tuning and installing Lectron carburetors across a wide range of bikes and riding styles. Whether you're working through your initial setup or fine-tuning for specific conditions, we're here to help. Reach out anytime - we'll make sure your carb is dialed in and your bike runs like it should.

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