Safety Hub: A Guide to Gear Ratings, Certifications, Airbags & Tech

New Arrivals for Spring: Shop 2026 Releases

Up to 50% Off Spring Sale Deals. Shop Top Brands

Get $15 Cash, Free 2 Day Shipping & More Perks With RPM*

JavaScript Disabled

To get the full Cycle Gear experience, enable JavaScript in your browser settings and refresh this page.

We're sorry but all Size options for this product are currently out of stock.

You can be notified upon their arrival by choosing the Size option you are interested in and then entering your email in the box below.

Out of Stock

Lectron Fuel Systems

Lectron Billetron 38 Long Body Carburetor Beta / KTM / Husqvarna / GasGas / Yamaha / Honda 250cc-300cc

Read 2 Reviews Write a Review

$599^.⁰⁰$619^.⁰⁰

Fast Lane

Size:

Blemished/Refurbished

This item is available as a Blem/Refurb. These are items that cannot be sold as "New" merchandise and are limited to stock on hand. See the product details for a description of the product's condition.

Members get up to $44.95 in total value with this purchase. Details

Add RPM for $39.99/year

Ships Free to Cycle Gear Stores!

The Cycle Gear Difference

Free Shipping Over $49^.⁹⁹
30-Day Best Price Guaranteed
No-Hassle Returns View Details

Lectron Billetron 38 Long Body Carburetor Beta / KTM / Husqvarna / GasGas / Yamaha / Honda 250cc-300cc

Lectron carburetors are a great choice for riders seeking improved performance, fuel economy, simplicity and smoother power delivery.

Features:

Billet construction
OEM throttle cable compatibility
Power jet screw adjustable by hand
H-Style aluminum slide
Bowl drain with integrated G-Force kit
Significantly more bottom end hit
Significantly improves throttle response
Faster power jet activation
New slide design and metering rod location improves idle
Finer idle adjustment (much finer threads on screw)
Lectron carburetors provide superior throttle response and power delivery by utilizing the their patented metering rod
Simple design does not incorporate multiple jets to replace
Tapered bore squeezes the air to increase speed and create fuel lift behind the flat metering rod

Note: You cannot run oil injection with this carburetor, fuel must be pre mixed.

Read More

Fitment Notes & Exceptions

You cannot run oil injection with this carburetor, fuel must be pre mixed
We do not recommend running a reed spacer as they may cause fitment issues, and the longer body of the Lectron compensates for the longer intake tract
Depending on some set ups, your air boot may rub on your shock spring which is normal and will not cause excessive wear

Product Style	Item #	Store SKU	Manufacturer Product #	Availability
Product Style 38mm Bore/78mm Length	Item # 10159450	Store SKU	Manufacturer Product # 1138-SMS-33B	Availability Out of Stock
Product Style 38mm Bore/90mm Length	Item # 10159441	Store SKU	Manufacturer Product # 1138-SML-33B	Availability Out of Stock

$39.99/yr.

Spend Less. Ride More.

5% RPM Cash Back*
10% Off Over 70 Brands
$15 in RPM Cash When You Join
Free 2-Day Shipping & Free Returns*
And more!

Become a member today! Learn More

By purchasing and enrolling in Riders Preferred Membership, you agree to the Program Terms and Conditions. *Some exclusions apply: 10% RPM discount applies on full price and sale price Exclusive Brands. 10% RPM discount applies on additional select brands at full price. Exclusions apply. RPM free 2-day shipping applies on qualifying items, contiguous U.S. only. Not available for AK, HI, or U.S. Territories. View shipping policies. RPM free returns apply on qualifying items and are processed on standard return timeline, contiguous U.S. only. View return policy.