Roban Bell 407 Gear Ratio?

[Kaliman911]

Hello,
Trying to find the gear ratio for my Roban Bell 407 scale. Want to setup my governor settings and can't find this info anywhere. Also, this Roban kit recommends a 450kV motor, but I'm using a 530kV I already had. What motor pinion do I need? The kit came with a 22T
I guess I would need the tail gear ratio too.

Thanks

Ed

[PawPaw]

Main is 13.8:1 and tail is 4.5:1. I’ve always used the pinion that came in the Roban kit.

[Kaliman911]

Thanks for the reply. Finally found it in the actual Roban RC website on the description of the heli. It reads actually 13.8 main and 4.7 tail.