WBFAir,
If this is your first larger helicopter I would highly recommend that you do not get the HK-2221-6 motor. You would be much better off using the HK-2221-8 motor. Using the -6 motor would be like putting a blown Hemi in a Drivers Ed car! Don't get me wrong, the -6 motor is awesome for experienced pilots, but it is actually too much power for a newer helicopter pilot.
The -8 motor with a 12 tooth pinion gear is a great place to start, and when you get more comfortable with the helicopter, you can step up to a 13 tooth pinion gear for more head speed.
The Scorpion motors are Outrunner type motors, where the entire outer can of the motor rotates. The stator winding sit stil in the middle of the motor, and the magnets, which are glued to the inside of the rotor can, spin around the stator.
It is best not to cut the lead wires on the motors, since they are the actual wires that the motor is wound with. These wires are tinned at the factory to remove the insulation from the wire before the bullet connectors are soldered on. If you cut the wires, you have to individually re-tin anywhere from 32 to 40 wires per lead, which means a total of 96 to 120 wires that need to be tinned! If you miss one or two, this can lead to current imbalances in the motor, so you are better off leaving the motor leads alone.The ESC leads, on the other hand, can be easily shortened if needed.
Your battery ESC and BEC sound well matched for the -8 motor. The -6 motor can pull over 53 amps of current in very hard 3D maneuvers, but you will probably not be pushing it that hard for a while.
If you have not purchased the motor yet, I would go with the -8 model and keep your existing ESC.
Lucien
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