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PRO SERIES Carburetor Kit for Kart's | Precision Fuel Delivery & Max Performance (38mm & 40mm)

Name: PRO SERIES Carburetor Kit for Kart's | Precision Fuel Delivery & Max Performance (38mm & 40mm)
Brand: Lectron Fuel Systems
SKU: 1700-PRO
Price: 899.99 USD
Availability: InStock

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89999

For Riders Who Want

The PRO SERIES Kart Carburetor Kit is a complete performance solution, including a billet aluminum carburetor, chrome-plated brass slide, throttle assembly, throttle cable, and fuel pump. Equipped with a three-circuit fuel system — Xcelerator Metering Rod, power jet, and torque jet — it’s built for responsive, no-fuss performance on both 2-stroke and 4-stroke karts. Designed to simplify setup while maximizing on-track results.

Includes

Kit Includes

(1) PRO-SERIES Carburetor Setup for Kart's
(1) Fuel Pump
12" of Vacuum Hose
(2) Lectron stickers

Built for racing. Tuned for control.
The PRO SERIES Kart Carburetor Kit is engineered for high-performance kart racing with zero jetting or tuning headaches. Designed for modern 2-stroke and 4-stroke kart engines, it delivers instant throttle response, broad power, and race-ready simplicity right out of the box.

Machined from billet aluminum and featuring our Xcelerator metering rod, power jet, and torque jet, this carburetor delivers smooth, consistent fueling across the entire RPM range. A chrome-plated brass slide ensures ultra-smooth throttle feel and long-term durability.

Each kit includes a fuel pump, 12" of vacuum hose, and an additional metering rod (leaner) giving you a complete system designed for peak kart performance with minimal setup time.

🏁 Who It’s For:
Racers and builders who want clean, consistent power, smooth control, and a complete, bolt-on solution — from sprint tracks to endurance racing.

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.

Carb Sizes: Which One is Right?

PRO-SERIES Kart

78mm Overall Length
46mm Spigot OD
62mm Bell OD

The PRO-SERIES Kart is engineered for high-performance 2-stroke and 4-stroke kart racing engines. With a compact body and precision fueling, it delivers razor-sharp throttle response, smooth power delivery, and consistent top-end performance under extreme racing conditions. The PRO-SERIES Kart comes standard with a 78mm overall length, 46mm spigot OD, and 62mm bell OD. Custom intake manifolds may be required for proper fitment and are available through us if needed.

Common OEM carbs replaced:

Keihin PWK 38 / PWM 38

Mikuni TM 38

Tillotson HL / HW (when converting to slide carb)

Other 36–40mm high-performance kart carbs

Example fitments:

Honda CR125-powered shifter karts

Yamaha KT100 (modified class)

TM K9 / KZ10 / KZ-R1 125cc engines

Rotax Max (slide carb conversion builds)

Predator 212 / GX200 / 225cc (race-modified 4-stroke classes)

CRF230F / CRF250F engine-swapped karts

Open-class 2-stroke or 4-stroke shifter karts running custom intakes

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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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