x400 Main Gear/Auto rotation gear/ Front drive gear

[fedex]

Pretty simple question really, can these gears be replaced with trex gears?

[Gizmo6035]

simple answer NO!
The tooth count and diameter are wrong.
Unfortunately Arc/Helimax doesn't seem to be interested in providing better quality gear sets so the only option I know of for the main gear and counter shaft set is Microhelli, very nice gears but pricey.
I have not seen a auto rotation gear replacement nor have I seen a true running one from Arc/Helimax.

[fedex]

Originally Posted by Gizmo6035

simple answer NO!
The tooth count and diameter are wrong.
Unfortunately Arc/Helimax doesn't seem to be interested in providing better quality gear sets so the only option I know of for the main gear and counter shaft set is Microhelli, very nice gears but pricey.
I have not seen a auto rotation gear replacement nor have I seen a true running one from Arc/Helimax.

Yeah, I have the microheli front drive gear in which the mesh is a little tight for my liking.. It spins by hand like 2 or 3 revolutions without hardly any motor mesh tightness.. I wish it would spin a little more freely, all I can hope is that it loosens up with more flights.