I suspect it's just compression you're feeling. If you don't kick it like you mean it, sometimes the engine will just laugh at you.Every second kick it will lock not go down. I have been lightly kicking the second kick then go full out in the third and it works.
Re: your clutch, did you take the worm actuator apart, clean and re-grease it? Did you oil the clutch cable? That needs doing also.