I did a little research on this and the PEAK Coreless (same motor) and here's what I got from Peak Racing
This is the data I can provide:

Watt: 5
No load Speed: 6.0 Volt 17820 rpm - 7,2 Volt 21384 rpm
Stall Torque: 29.7 mNm
Terminal resistance: 0,325 Ohm
Efficiency: 87%
Magnet: Neodym
Commutator: 9 segments
Brushes: Precious metal
Weight: 42g
Length: 28,9 mm
Diameter: 21mm
I'm currently using a MS Hornet/Graupner Speed 300 6V, Thinking of the Orion as a LI-Poly Motor using a 2 cell pack so as not to exceed the 7.2 Nominal on the Motor. I'm still learning to Hover myself impaitently awaiting the arival of the Postman whose got my package from HeliHobby with my new Mains in it. He's usually here by now. Hven't flown in 2 days starting ROTOR WITHDRAWALL LOL.