Two max on Metropia Forward: one right after the start if you have a turbo, and one on the little hump if you take it on the far right side with nose up near the end of the track.
Metropia Reverse: One by taking that little hump on the left and BR, you can land on the weapon pad, one near the end with a turbo, don't pitch up too much or you will hit the supports on the sides of the hill that goes down in the chicanes.

I don't know if it's clear enough. One out of two is risky though, you can end up teleporting or hitting a wall and stopping dead.