change problem at Yamaha Raptor 660R

I have a problem of change in a quad raptor, the 2nd is skipped as if I was picing clutch, I have already opened the engine and reviewed the box and everything is perfect there is no anomaliars to know if someone has happened to him this and what could it be? I have already changed the chain, it could be from the exit pinon or Catalina, thanks.

Hello, I saw this and I have the same problem, do you remember the solution?