ProTek RC 5MM to 4MM Bullet Reducer (2) 5005

This is the only product I have found that will fit up into the 5.5 mm Castle Talon 90 ESC plugs. You then have a custom made adapter that goes from the 5.5 mm male plug on the Talon 90 ESC to the 4 mm socket to accommodate your 4 mm male motor wire ends. Just push the small end of the bullet reducer into the 5.5 mm gold connector that comes with the Castle Creations Talon 90 ESC. Just "sweat" some solder around the joint where the two items fit together and you'll have exactly what is needed.

These are a great fit and only raise the terminals by a few millimeters

One of them was a bit too big and I had to sand it down so it would fit

Exactly as advertised.