BBR Tuning 2-Stroke Motorized Bicycle Engine 66/80cc High Performance Carburetor &ndash; Gas Bike Carburetor Upgrade BOOSTS PERFORMANCE: The BBR Tuning 2-Stroke Motorized Bicycle Engine 66/80cc High Performance Carburetor drastically increases airflow and fuel delivery resulting in more power. This power translates into a huge increase in torque and acceleration and resulting in an overall better performing engine. AUTOMATIC CHOKE: This carburetor comes standard with an automatic choke that will release with throttle input once the engine is properly warmed up. No more reaching back and adjusting your choke while riding. EASY INSTALLATION: Featuring a 78mm jet this carburetor comes pre-adjusted and requires no fine tuning, making installation a breeze. Just remove your old carburetor and bolt on your new BBR Tuning 66/80cc High Performance carburetor and your good to go. *NOTE: if you are at a higher elevation you may need to change jet size for this carburetor to run properly. UNIVERSAL FIT: Deigned to work with most standard 66cc and 80cc 2-stroke motorized bicycle engine kits PACKAGE INCLUDES: 1x BBR Tuning 2-Stroke Motorized Bicycle Engine 66/80cc High Performance Carburetor, 1x High Performance Cone Filter