All of my french do when I get them but by the time you swap ignitions they don't fit. Both of my av10s do but thats because I didn't swap the ignition on one so the cover fits and the other is a kickstart so theres not really a cover to take off.
As far as my other bikes, both my za50s have covers because they are painted and I think they are pretty. All of my other bikes don't have them because I start messing with them. Then by the time I'm done, I've lost the hardware (2 bolts). Because its not a size I have sitting around, I just leave them off.