The other obvious change in the 1969 model was the addition of a hard plastic downtube cover, designed specifically for the CT90. Earlier models had retained the Super Cub's air filter box, located on the downtube, and with the removal of the wide shield of the street model, a fabric cover had been used. The new cover would run from the head tube to the bottom of the downtube, providing protection to the carburetor, and the air filter was now located in a plastic box attached to the side of the frame.