Riding down the road today I saw a big Harley bagger-maybe Road King, I don't know my Harley's very well-was riding with only his left hand on the handle bars! I was behind in the other lane at a couple of stop lights and couldn't figure out what was going on because his right hand appeared to be in his lap and never moved.
When he turned off to the left, I finally saw that his right sleeve was empty-no arm from at least above the elbow down.
I figure the brakes were linked so he could use his right foot for that and maybe the throttle was on the left side but it seems it would be tricky to work the clutch and throttle with one hand unless it was one peice-clutch lever rotated with the throttle.
At any rate the guy was smooth as silk and I salute him if he can handle that monster with one hand! Just getting one off the kick stand is a challenge.

Has anyone ever seen anything like an integrated clutch and throttle mechanicism? My 10 speed bike has something like that for the gear changer and brake.