OK Kyosho fans,
After having Kyosho rc motos since 1993, I learned a lot from them.
One the THE biggest annoyances is the lower cowl dragging and falling off!!! Argh >

Because of this, most club racers run without it!
I hate running without it cause it ruins the scale look for me!!
(see images)
I have found THE solution to the issue. After looking at the height of the cowl, and looking at images of real race bikes, I saw that the front of the scale cowl is lower than the rear. Referencing the Suzuki cowling, I cut the bottom front of the lower cowl using a Dremel, so that the bottom of thelower cowl is level with the ground. I bonded in a piece of styrene plastic, sanded it and painted it.
The white cowl is a Honda uncut cowl for reference. See comparison images to show the height of the front of the cowl after modding.
The ONLY time the cowl is dragged now is when I crash (LOL).
Hope this tip helps!