Technical Guide to Optimizing Twostroke Performance With Lectron Fuel Systems
Lectron Fuel Systems, a supplier of carburetor systems for high-performance two-stroke engines, has built its product range around a central engineering goal: delivering precise fuel metering across different displacement classes and operating conditions. The lineup extends from small off-road motorcycles to multi-cylinder competition engines, with each model presented as an application-specific solution rather than a universal carburetor.
The company’s catalog covers a broad range of intake sizes. Its technical positioning emphasizes precise metering and improved fuel atomization, with each series intended for a particular level of performance, maintenance access or engine architecture. The main models are summarized below.
| Product series | Size range | Intended application |
|---|---|---|
| PRO-SERIES | 38mm–40mm | High-performance racing and precision tuning |
| H-Series EVO | 38mm | Balance of performance and simple maintenance |
| BILLETRON | 25mm / 29mm | 65cc–112cc off-road motorcycles |
| Lectron EVO | 30mm–59mm | High power output and reliability requirements |
| PRO-2 | 32mm | Enhanced throttle response |
At the top of the range, the PRO-SERIES is offered in 38mm to 40mm sizes for high-performance racing and precision tuning. The H-Series EVO uses a 38mm size and is positioned around a balance between performance and straightforward maintenance. BILLETRON, at 25mm and 29mm, targets 65cc to 112cc off-road motorcycles, while the Lectron EVO spans 30mm to 59mm for applications requiring high power output and reliability. The PRO-2, at 32mm, is intended to provide enhanced throttle response.
Selection is governed by engine displacement, intake requirements and the desired power delivery, according to the product information. The company also distinguishes between general performance applications and specialized uses such as drag racing and snowmobiles, for which it offers multi-cylinder kits and downdraft carburetors.
For engines running on alcohol fuel, the PRO-SERIES alcohol-specific carburetor is designed around the fuel’s different metering requirements. In broader terms, the system is intended to reduce the complexity of calibration, with technical manuals and FAQ material helping users pursue an appropriate air-fuel ratio under varying conditions.
Because two-stroke engines are highly sensitive to fuel ratio and intake efficiency, installation is only the first step in achieving stable performance. The company advises users to make fine adjustments in line with its tuning guidance after installation.
For unusual engine configurations, customized specifications can be developed so that carburetor size and calibration better match the engine’s operating conditions. The emphasis is on matching the fuel system to the engine’s displacement, airflow and intended use rather than applying one specification across all platforms.
