ProTek RC Aluminum "Elliptical" Samurai 321B Carburetor Restrictor (7.5mm)

The ProTek RC Aluminum "Elliptical" Samurai 321B Carburetor Restrictor uses a 7.5mm oval venturi design to adjust airflow into the engine. Its elliptical shape is designed to provide improved fuel mileage and progressive power delivery, with smooth low-end response and increasing power as RPMs rise.

Product Features

• Aluminum carburetor restrictor
• Elliptical oval shape
• 7.5mm diameter
• Compatible with Samurai 321B, OS V-Spec, Novarossi and RB carburetors
• Designed to fine-tune engine power delivery and run time

A larger venturi generally increases top-end power for larger tracks, while a smaller venturi improves bottom-end throttle response and can help increase run time. Replacement restrictor o-rings are available separately under part number PTK-2517.