Made from aircraft quality 6061 aluminum, this brake rod adapter allows for the simultaneous installation of our Rear Brake Kit with the use of the stock rear brake pedal. For use with factory drum brakes on Honda XR/CRF50, CRF/XR70, CRF110

THE CRF110 NEEDS A BRAKE KNOB TO USE THIS ADAPTER, THE STOCK ADJUSTER IS TOO LARGE AND WONT FIT
HERE IS THE LINK

https://www.50stunt.com/product_p/mmct-0130.htm