My cruise control kept failing for some unknown reason. Was driving me nuts trying to figure it out. I ended up stumbling across a post somewhere in the forum saying that it could very well be the leather streamers that so many of us install on our clutch & brake levers. Just the resistance thru the wind when travelling is enough to cause cruise control failure/interupt.
No problems now that I changed the streamers to the handle bar. What a great info forum....
Bobby