Aching hands don't just ruin a long trip on a motorcycle, they can turn a leisurely ride into a dangerous nightmare. After ruining my last motorcycle vacation, friends recommended the $10 Cramp Buster as a solution superior to spending lots more on complicated mechanical throttle locks.
Cramp Buster is a lever. The most complicated thing about it, at least on my BMW, is getting it on the grip. 1970s BMWs have pretty thick grips, so I bought the "over size" version, and needed it. Once on, its quite simple. Adjust it by spinning it counter clockwise on the grip. Counter-clockwise opens the throttle, and doesn't spin on the grip. I find the plastic lever has a bit more flex to it than I particularly want, but I'm sure I'll get used to it pretty quickly.
For riding around the canyon roads near my house, the Cramp Buster didn't come into play much, as its really there to help ease freeway miles. I got to try it out on the 101 for a bit, and the lever allows a much more comfortable cruising position. I'm very much looking forward to trying it on a longer trip, in a week or two!