YT175 Help?

[Yamaha Tri-Moto]

I was just wondering, my manual dosent say anything about oil in the front forks of my 83' 173. Does anyone know how much if any, and if so how do i do it. i popped off the caps and didint see anywhere to put it in. Any ideas thanks.

[Unclediezel]

I think they are only springs--no oil----Someone here will know for sure