Name: Legacy Carburetor for 2-Strokes | 30mm - 59mm for High Power Performance, Trusted Reliability, & Ultimate Simplicity
Brand: Lectron Fuel Systems
SKU: 1400-L
Price: 499.99 USD
Availability: InStock

Classic performance, modern refinement.
The Legacy 2-Stroke Carburetor is a proven solution for custom builds, vintage restorations, and riders who want tunable performance with broad sizing options. With sizes ranging from 30mm to 59mm, the Legacy Series is perfect for small-displacement engines, custom applications, and riders who want full control over fuel delivery.

Built with a cast aluminum body, it features a standard metering rod and power jet to fine-tune your top-end performance — all while delivering smooth power, consistent throttle response, and top end horsepower gains.

🏁 Who It’s For:

Riders and builders who want versatile performance, adjustability, and proven reliability — whether it’s for a custom build, vintage race bike, or high-revving 2-stroke setup.

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?

Lectron Legacy (30mm - 44mm)

30mm | 93mm Overall Length/37mm OD Spigot/62mm OD Bell
34mm | 93mm Overall Length/40mm OD Spigot/62mm OD Bell
36mm - 44mm | 88mm Overall Length/46mm OD Spigot/62mm OD Bell

The Legacy Series carburetors (30mm - 44mm) are designed to replace OEM carbs in the 30mm–44mm range. These sizes are ideal for small to mid-displacement engines running performance upgrades or big bore kits. Expect smoother fueling, better throttle response, high power and a hassle-free, no jetting experience compared to outdated stock carbs.

Common OEM carbs replaced:

Keihin PWK 30

Keihin PJ 34

Mikuni TM 30

Mikuni VM 30

Mikuni TMX 30–36

Go Big, Go Billet

48mm | 97mm Overall Length/52mm OD Spigot/60mm OD Bell
52-50mm | 114mm Overall Length/56.5mm OD Spigot/76mm OD Bell
52mm | 103mm Overall Length/61mm OD Spigot/76mm OD Bell
54mm | 103mm Overall Length/61mm OD Spigot/76mm OD Bell
56mm | 103mm Overall Length/61mm OD Spigot/76mm OD Bell
58mm+ | 103mm Overall Length/61mm OD Spigot/76mm OD Bell

The Legacy 48mm+ Series carburetors are precision-machined from billet aluminum and built for high-output race engines that demand serious fuel and airflow. Available in 48mm to 59mm bore sizes, these are purpose-built for drag racing, big-bore builds, and wide-open desert or dune machines. With massive internal volume and razor-sharp response, they’re made to feed engines that operate at the edge of performance.

All sizes in this range are constructed from billet material, ensuring durability, consistency, and smooth fuel delivery under extreme conditions.

Common OEM carbs replaced:

Lectron 48mm–50mm

Keihin PWK 41 / 44

Mikuni TM 48 / TMX 50

S&S-style or custom-modified large-bore race carbs

Other billet or modified 45mm–58mm single-carb setups

Example fitments:

Honda CR500 (drag build or dune setup)

KTM 500 / 550 2-stroke (carb conversion)

ATV: Banshee (big-bore single-carb conversion or twin-carb setup)

ATV: TRX250R with extreme stroker kits

Custom sand drag bikes and methanol-fueled hill shooters

Snowmobiles using large single-cylinder or twin-cylinder 2-stroke conversions

Compatibility Chart

87 vehicle(s) are compatible with this part.

Year	Make	Model
2001	Honda	CR500R
2000	Yamaha	WR500
2000	Honda	CR500R
1999	Yamaha	WR500
1999	Husqvarna	WR390
1999	Honda	CR500R
1998	Yamaha	WR500
1998	Husqvarna	WR390
1998	Honda	CR500R
1997	Yamaha	WR500
1997	Husqvarna	WR390
1997	Honda	CR500R
1996	Yamaha	WR500
1996	Husqvarna	WR390
1996	Honda	CR500R
1995	Yamaha	WR500
1995	Husqvarna	WR390
1995	Honda	CR500R
1994	Yamaha	WR500
1994	Husqvarna	WR390
1994	Honda	CR500R
1993	Yamaha	WR500
1993	Husqvarna	WR390
1993	Honda	CR500R
1992	Yamaha	WR500
1992	Husqvarna	WR390
1992	Honda	CR500R
1991	Yamaha	WR500
1991	Husqvarna	WR390
1991	Honda	CR500R
1990	Yamaha	WR500
1990	Husqvarna	WR390
1990	Honda	CR500R
1989	Yamaha	WR500
1989	Husqvarna	WR390
1989	Honda	CR500R
1988	Yamaha	WR500
1988	Husqvarna	WR390
1988	Honda	CR500R
1987	Yamaha	WR500
1987	Suzuki	RM500
1987	Husqvarna	WR390
1987	Honda	CR500R
1986	Yamaha	WR500
1986	Suzuki	RM500
1986	Husqvarna	WR390
1986	Honda	CR500R
1985	Yamaha	WR500
1985	Suzuki	RM500
1985	Husqvarna	WR390
1985	Honda	CR500R
1984	Yamaha	WR500
1984	Suzuki	RM500
1984	Husqvarna	WR390
1984	Honda	CR500R
1983	Yamaha	WR500
1983	Suzuki	RM500
1983	Husqvarna	WR390
1982	Yamaha	WR500
1982	Suzuki	RM500
1982	Husqvarna	WR390
1981	Yamaha	WR500
1981	Suzuki	RM500
1981	Husqvarna	WR390
1980	Yamaha	WR500
1980	Suzuki	RM500
1980	Husqvarna	WR390
1979	Yamaha	WR500
1979	Husqvarna	WR390
1978	Yamaha	WR500
1978	Husqvarna	WR390
1977	Yamaha	WR500
1977	Husqvarna	WR390
1976	Yamaha	WR500
1976	Husqvarna	WR390
1975	Yamaha	WR500
1975	Husqvarna	WR390
1974	Yamaha	WR500
1974	Husqvarna	WR390
1973	Yamaha	WR500
1973	Husqvarna	WR390
1972	Yamaha	WR500
1972	Husqvarna	WR390
1971	Yamaha	WR500
1971	Husqvarna	WR390
1970	Yamaha	WR500
1970	Husqvarna	WR390

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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 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.

Legacy Carburetor for 2-Strokes | 30mm - 59mm for High Power Performance, Trusted Reliability, & Ultimate Simplicity