I've put some quality time with the Pro-Lever and I'm convinced that I'll probably never install a Rekluse on this bike. Which is a first for me in many years.
It absolutely works as advertised. This unit is very high quality and the real deal. It took a little time to get figure out the perfect performance and feel but after some riding with the cams that they included I've settled on a brake cam and a clutch cam that gives me the flexibility I need.
Overall it has been very easy to get used to using it and now I've grown accustomed to relying on it. Here's where it shines the most:
Downhills. Just yesterday we traversed some rather rocky and steep downhills but able to have my feed anchored on both pegs in a balanced way, my hind end hovering over the rear of he seat to push weight towards the back, and using one finger per hand to control the brakes yields a confidence I've not had before. And it's MUCH easier to control the amount of braking on the descent with a finger than with my big, bulky mx boot. Faster, more controlled downhills.
Right-hand corners. I try to stand most of the time when I'm riding but I like to sit hard in the corners and get the inside leg up. Not practical using the rear brake pedal. Very practical using the Clake.
I'm using more front brake. This may sound strange but one thing that has happened without me even thinking about it. I've always used my front brake under some circumstances but I really didn't have the nerve to use it whole-heartedly in turns and the mud. The brake cam I settled on has a slow start but gets aggressive as the lever is pulled toward the bar, so if I need to really get the rear to start braking my clutch is completely disengaged. But I found that when I'm finessing the rear brake (and the clutch is just starting to disengage) at partial lever closings I'm braking more and more with my front brake in more situations. This is weird but the result is I'm learning to stop better, to use the power of the front brake more. I've always known my front brake was there . . . and now I'm using it more. Like I said, weird.
Better control of the rear wheel. Since there is overlap between the clutch and the rear brake, the clutch is actually partially engaged as the brake is first applied (but, of course, fully disengaged when you brake hard). No brake hop. And I think it's playing a role in better traction.
I seldom use the brake pedal, but when I do it works just as well as when it was simply a master-slave system. Now using the rear pedal is a master-slave-master-slave configuration: yes, two masters, two slaves, two cables - and it feels no less solid than before the Clake.
Oh, and I did replace the clutch cable; in fact, I MADE one with the help of another forum member - thanks Luziana Long!
I'm going to post a little video soon that shows how the clutch plates move with the different lever positions.