BMW Throttle Friction Screw
(aka the hillbilly cruise control)

This is a controversial mod. Many LDR folks believe that a ‘cruise control’, be it a true electronic cruise control or something as simple as a throttle lock, is a BAD THING for long-distance motorcycle riding. The primary concern is that, should the rider momentarily snooze, the bike will not naturally snap the throttle shut (either waking the rider up and alerting him to his condition or at least reducing the speed at which the rider will crash). Others believe that a cruise control of some form or another helps reduce rider fatigue and thus makes it less likely that a rider will encounter a fatigue-related problem.

Having said all of that, I have run a throttle lock/friction device on my last five motorcycles. I find it invaluable in allowing me to relax my right hand/wrist when droning along the freeway. Ya pays yer money and ya takes yer chances..