The back roads around Chico, Red Bluff area of Northern Cal have some nice pavement and some long sweepers. These were listed as 55 mph.. I think the speed limit was 55 on the straight parts so the sign must mean "keep the throttle on .. don't bother backing off for this one Jack." It's usually easy to double any corner speeds posted so hitting these at over 100 would be pretty good stuff. Not that I could've done that on my bike.. it would have rattled every nut and bolt off before I slid out from the bald rear tire.