If they don't kick start it's usually in the tuning & that's true with ANY bike. If the engine is a basic piece of shit from the start, of course it won't kickstart, but otherwise it's something in the tuning. Neglect ANYthing & it won't run right.
Gotta say, that's a accurate statement...Don't forget operator error too, That seems to catch people and makes kickstarting a bit of a chore..