BETA 300RR Lectron Big-Air Billetron - 40mm 2-Stroke Carburettor

The BILLETRON Big-Air is designed specifically to maximize performance in big bore two strokes while continuing in the simplicity and technology of Lectron heritage. Gain peak performance, lose the jets. The BILLETRON Big-Air builds on the existing two fuel circuit system of the legacy Lectron products. Continuing with Lectron Metering Rod Technology and the Adjustable Power Jet fuel circuit for top end fuel adjustment, the BILLETRON™ Big-Air mechanically adjusts to your elevation changes and weather conditions while giving flexibility to adjust top end fuel, delivering optimal peak performance. The BILLETRON™ Big-Air has been engineered to take big bore volumetric capabilities and create specific air flow delivery and fuel dynamics that maximize peak performance. This results in carburettor that has been designed, engineered, and manufactured specifically to maximize your built machine.

Key Features:

• Newly designed bore for air flow and fuel optimization in big bore two strokes
• Two fuel circuits: Metering rod - Power jet
• OEM Ready - Use your OEM throttle cable and throttle
• Fuel Drain Plug
• DIY rebuild capability - change gaskets, o-rings, and other parts in your garage

 Lectron Fuel Systems has taken years of rider feedback on their wildly popular 38mm H-Series Carburettors to develop the all new Billetron 38mm 2-Stroke Carburettors. The new billet aluminium construction reduces the weight of the carburettor which adds to the impact resistance and visual appeal of the carburettor. The redesigned bell and bore, along with the H-Style slide, give a faster response and better bottom end hit. The choke and idle/power jet screws are now more accessible allowing for quick tuning on the track or trail. Shorter than the H-Series, in both length and height, this carburettor fits more like an OEM carburettor. It also uses the stock throttle and cable making installation easier than ever. 

With both increased performance and an improved user experience, the Billetron 38mm is a game changer...

Technical Specifications:

• Machined billet aluminium construction reduces weight and increases strength
• Reuses the stock throttle and cable
• Redesigned bell and bore for increased bottom end performance
• Shorter overall length (~78mm) and height allow for a better fit
• The choke has been redesigned and moved to the left side for easier and more consistent usage
• A larger, more accessible idle screw with finer threads allows for easier and more accurate tuning
• The power jet screw is now located horizontally on the left side and can be turned by hand for quick adjustments
• Stronger, clear float bowl with bowl drain and integrated g-force kit
• New float system with a proprietary, high flow, sprung needle seat valve
• Redesigned top cover for easier access to the slide and metering rod and further weight reduction
• New metering rod adjustment mechanism allows for 1/8th turn increments
• Easy Tuning Kit (sold separately) makes metering rod adjustments quick and simple
• Includes 2 quick change billet thumbscrews for the top cover and a metering rod adjustment tool
• Aluminium H-Style slide
• Relocated vents
• Metric hardware
• “Jetless” (no jets)
• Automatically compensates for elevation & temperature changes
• Dramatic increase to fuel economy
• Made in the U.S.A

Performance Improvements:

• Hits similar to a well tuned jetted carburettor with the smoothness and consistency of a metering rod carburettor
• Smoother power delivery than stock
• Significantly more bottom end hit
• Significantly improved throttle response
• Faster power jet activation
• The new slide design and metering rod location improves idle
• Finer idle adjustments

Optional Extra - EZ Tuning Kit 

This kit includes the metering rod adjustment tool (Universal across all Lectrons) and the Billetron specific quick change top cover thumbscrews.    

Optional Extra - X-Celerator Metering Rod  

The X-celerator metering rod is Lectron's latest development that brings acceleration and throttle response to new lights. This new technology supplies a small burst of fuel when quickly opening the throttle that counteracts the abrupt influx of airflow and eliminates throttle lag or bog. This results in instant throttle response and immediate power delivery regardless of where you're at in RPM.  The new design mechanically and automatically controls the right amount of fuel depending on your throttle position and rate of throttle opening to assign your engine the right amount of fuel when and where you need it.   

Both available to add to your order here:

Optional Extras available here