I use one of those store bought jobs, withthe little flip lever on it. I ride the expressway alot, and long distances on the two lanes where there is 15 miles or more between towns. For that, I like it, lets me ride with one hand on either side, but I do notice that the faster I go, the tension of the return spring on the carbs is stronger than the pressure from the clamp inside.

H.C.C.M.F. Local 6978
http://hondacb750parts.net