Will some one please explain how in fine nights at Freddy's 4 it said it was the bite of 83 when in all the others it was the bite of 87 I am very,very confused.

The bite of 83 caused the hybrid suits which are the golden animatronics to be discontinued and scrapped. The bite of 87 caused by mangle made the toy animatronics be scrapped due to lazy employees giving up on repairs. That's all I got to say, anything else you need to know my friend?

Well that seems valid, my thanks