Yes, I have one and I will do it again if I ever own another ZX-11. I installed it at the same time than a complete assembled and undercutted tranny so I can't tell about the shift kit alone; but I'm pretty sure the gain I got in "positivism" in shifting are mainly due to it.Anyone put a Factory Pro shift kit in? If so, worth it or hard?
Ignition advancer is another story. It could work on some bikes but not on most. Read my post about this in the link below. If you really want to try it, I could sell you mine; it is a $90US adjustable Factory Pro. But you must not be in a hurry though...Also, what about an Ignition Advance kit? Same?