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Legacy Carburetor Kit for Kart's | High Power Output for Custom Engines & Fuel (30mm-44mm)

Name: Legacy Carburetor Kit for Kart's | High Power Output for Custom Engines & Fuel (30mm-44mm)
Brand: Lectron Fuel Systems
SKU: 1700-L
Price: 619.99 USD
Availability: InStock

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61999

For Riders Who Want

The Legacy Kart Carburetor Kit features a cast aluminum body with a standard metering rod and power jet, offering proven top-end performance and full manual adjustability. Available in 30mm–44mm sizing to suit a wide range of kart engines. Each kit includes a fuel pump, making it a complete, race-ready solution for classic tuning enthusiasts.

Includes

All kits come with:

(1) Legacy 30mm-44mm Carburetor Setup for Kart
(1) Fuel Pump
12" Additional Line
(1) Additional Metering Rod (leaner)
(2) Lectron Stickers
(1) Tuning Manual and Installation Guide

Classic tuning. Proven performance.
The Legacy Kart Carburetor Kit is a go-to choice for racers and builders who want full adjustability and reliable performance in a traditional setup. Built from cast aluminum and available in 30mm to 44mm sizes, it’s ideal for custom kart builds, vintage engines, and riders who want to dial in their powerband with precision.

Equipped with a standard metering rod and power jet, the Legacy delivers strong top-end power, smooth throttle response, and wide-range adjustability for elevation, track conditions, or engine mods. Each kit includes a fuel pump, additional fuel line, and an additional metering rod (leaner) offering everything you need for a complete install.

🏁 Who It’s For:
Kart racers, tuners, and builders who want manual tuning control, proven reliability, and a kit that adapts to custom or vintage kart engine setups.

Metering Rod

The Standard Metering Rod is a key component of our dual-circuit fueling system, engineered for smooth throttle response and clean power delivery. Positioned directly in the manifold pressure zone, it responds instantly to changes in throttle input, drawing fuel based on airflow velocity and engine load.

The rod’s contoured surface and precision grind control the fuel pickup signal with exceptional accuracy. As airflow increases, the rod delivers atomized fuel in a fine vapor—optimizing combustion, improving throttle snap, and eliminating flat spots.

Unlike traditional carburetors with overlapping circuits, the Standard Metering Rod delivers a linear fueling curvewithout hesitation or surge. This design enhances rideability, fuel economy, and power across the entire RPM range.

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.

Proven Performance

Our carburetors are built on well-established fuel delivery principles that have been tested across countless on and off-road applications. Whether you're racing, trail riding, or running a custom build, you can count on predictable throttle response, smooth power delivery, awesome peak power, and long-term reliability.

This is performance you can feel — without needing to overthink it.

Cast Aluminum Construction

Our carburetors feature a precision-cast aluminum body, offering the ideal balance of strength, weight, and affordability. Cast aluminum provides excellent heat resistance and structural integrity, making it well-suited for off-road and high-vibration environments.

Unlike billet or plastic-bodied carbs, cast aluminum keeps costs lower while maintaining reliable performance where it counts. It’s a practical, proven material that delivers real-world durability without adding unnecessary expense.

No-Jetting

Our carburetors use a dynamic fuel delivery system that self-compensates for changing conditions like altitude, temperature, and humidity. Unlike traditional carbs that require constant jetting adjustments, ours deliver consistent fueling with no extra effort.

Just bolt it on and go — whether you’re riding at sea level or climbing elevation.

Carb Sizes: Which One is Right?

Legacy Kart

87mm Overall Length
35mm - 46mm Spigot OD
55mm - 62mm Bell OD

The Legacy Kart carburetor is a proven choice for kart racers running 2-stroke or 4-stroke engines in the small to mid-displacement range. With classic cast-aluminum construction, it’s highly tunable and reliable—ideal for racers who want smooth power delivery, responsive throttle, and control across the RPM range. Available in 30mm to 44mm bore sizes, the Legacy Kart is well-suited for everything from 100cc sprint karts to 250cc 4-stroke builds.

Common OEM carbs replaced:

Keihin PWK 30 / 33 / 35 / 38

Mikuni VM 30 / TM 34 / TM 38

Dellorto VHSB / VHSH 30–36

Tillotson HL series (for slide carb conversions)

Other 30–40mm kart-specific race carbs

Example fitments:

Yamaha KT100 (stock and modified classes)

Honda CR85 / CR125 kart engines

KTM 85 / 125 kart engines

Polini 100cc / 130cc 2-stroke race engines

Predator 212 / GX200 / 225cc 4-stroke (mod builds)

Open-class 100cc–250cc karts running traditional intake setups

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FAQ

+ 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.

+ 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.

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