ProTek RC Aluminum Samurai RM, S03 & R03 Carburetor Restrictor (6.5mm)

The ProTek RC Aluminum Samurai RM, S03 & R03 Carburetor Restrictor provides a 6.5mm venturi for tuning engine air flow and power delivery. It is designed for the Samurai 321B and is also compatible with OS V-Spec, Novarossi and RB carburetors.

Changing the venturi size adjusts the balance between throttle response, top-end power and run time. A larger venturi can increase top-end power for larger tracks, while a smaller venturi can improve bottom-end throttle response and run time.

For replacement restrictor O-rings, use ProTek RC part PTK-2517.