Since virtually no one (besides yourself) has a kick-starter on his KLR650, Peter, how can we possibly answer your question with any validity?
You can surely disable your KACR (removing a spring or two is the trick, I think) and try it yourself.
I'm not sanguine about the prospects; the lever, gear reduction, etc., were all designed around the premise of a working KACR. Without the device, could be a hard row to hoe, inviting kick-back injury, etc.
Regardless, don't see how a trick cam would be of any significant consequence regarding cranking, with or without electric starter/kick starter, with or without KACR. The additional stress of stronger valve springs, higher lift, and steeper ramps on a trick cam should be overcome with nominal cranking force, I'd imagine.