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BILLETRON Carburetor Kit for Kart's | Acceleration, Torque, & Simplicity (29mm, 38mm, 40mm)

Name: BILLETRON Carburetor Kit for Kart's | Acceleration, Torque, & Simplicity (29mm, 38mm, 40mm)
Brand: Lectron Fuel Systems1
SKU: 1700-B
Price: 719.99 USD
Availability: InStock

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71999

For Riders Who Want

The BILLETRON Kart Carburetor Kit includes a billet aluminum body, and a two-circuit fuel system featuring the Xcelerator Metering Rod and power jet for smooth, linear power delivery. Available for both 2-stroke and 4-stroke kart engines, it ships as a complete kit with a fuel pump, additional fuel line, and an additional metering rod (leaner). Perfect for racers who want reliable, easy-to-tune performance with zero jetting headaches.

Includes

Each kit comes with the following;

(1) BILLETRON Carburetor and setup for your Kart
(1) Fuel Pump
12" of Vacuum Line
(1) Additional Leaner Metering Rod
(2) Lectron Stickers
(1) Tuning and Installation Guide

Linear power. Zero hassle.
The BILLETRON Kart Carburetor Kit is built for racers who want crisp, predictable throttle response and simple tuning — with no jetting changes required. Designed for modern 2-stroke and 4-stroke kart engines, it delivers strong low-end torque, smooth midrange, and clean top-end power in a durable, billet-machined package.

Featuring a two-circuit fuel system with our Xcelerator metering rod and power jet, the BILLETRON offers consistent fueling and excellent throttle feel in tight turns and high-speed straights alike. An included throttle cable, fuel pump, and 12" of vacuum line make this a complete, race-ready kit.

🏁 Who It’s For:
Kart racers who want set-it-and-drive simplicity, responsive control, and clean, reliable performance — without the tuning complexity of traditional carbs or EFI.

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.

Carb Sizes: Which One is Right?

BILLETRON Kart

29mm | 78mm Overall Length / 35mm Spigot OD / 50mm Bell OD
38mm | 78mm Overall Length / 46mm Spigot OD / 62mm Bell OD
40mm | 78mm Overall Length / 46mm Spigot OD / 62mm Bell OD

The BILLETRON Kart carburetor is designed for kart racers who want performance with simplicity. Available in 29mm, 38mm, and 40mm sizes, each model is built from billet aluminum and features our Xcelerator metering rod and power jet system for reliable, no-hassle fueling. With smoother throttle response and consistent top-end performance, it’s ideal for racers who want to set it and forget it—without compromising speed.

Common OEM carbs replaced:

Keihin PWK 28 / 38 / 39

Mikuni TM 28 / TMX 38 / TMX 40

Dellorto VHSB / VHSH 30–39

Tillotson HL / HW (when upgrading to slide carb)

Other 28–40mm kart or mini-bike carbs

Example fitments:

29mm:

– Yamaha KT100 (blueprinted or modified)

– Honda CR85 / CR125 kart engines

– 100cc 2-stroke sprint karts

– Pitbike-based karts and mini road racers

38mm & 40mm:

– Honda CR125 / CR250 shifter karts

– TM K9 / KZ10 / KZ-R1 125cc engines

– Rotax, IAME, and Vortex 125cc engines (mod builds)

– 212cc–250cc 4-stroke kart builds (high-RPM open classes)

– Custom 2-stroke shifter karts running big-bore setups

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FAQ

+ 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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