Stock Motobecane throttles are fairly robust. I just dremeled out set screw groove to increase the pull for my Polini CP19. They are easy to take apart and clean if they get sticky and they don't have any little clips, springs, or bits to loose or break like in some of the other assemblies.
I'm also rocking a Lusito throttle I got from Treats on one of my other bikes. The top cap has cracked in like 3 spots. I'll likely cover it in epoxy so it stays in one piece. If it wasn't so cheap I would be upset.