POWER UP GY6 CARBURETOR KIT:
https://www.rollingwrenchdenver.com/products/gy6-oko-complete-carburetor
WIDE BAND CARBURETOR TUNING TOOL:
https://www.rollingwrenchdenver.com/products/wide-band-o2-sensor-tuning-kit
One of the best modifications you can make to your GY6 engine is going from a stock CVK style carburetor to a PWK slide style carburetor. The difference in performance will blow your mind. Your GY6 will have better throttle response and acceleration. The CVK carburetor that is in your engine is not made for performance, but for fuel economy. The slide style carburetor is made purely for performance in mind! it just want to be opened up!