All you can do is try. Another thing I'm going to try is a multi-step process of sanding the gear smooth, chamfering the edges of the gears, polishing the gear on a cloth polisher. Next step will be to take the gear and get it Cryo-treated(actually most of the motors steel parts will be Cryo-d ) This aligns the molecules for strength. Then coat the gear with Techline Powerkote Dry-Film Lubricant. You can air-brush or paint it on with a foam brush. I'll be doing the back sprocket, too.
Get a hi-quality chain, American made if you can find it, and make sure of the alignment and you've done about all you can for a chain drive system.