Artin motors

[burad]

I noticed in the Slot Car News Motor List it said that Artin made a white endbell motor that tested out at 26K.
I have one Artin car that is a lot faster than my other Artin cars, and I was wondering if anyone knew if there was any visual way to tell the fast motor apart from the normal 13K motor. And if any particular Artin cars came with that fast motor as standard, or if it's just random.

bradg

[Ky.Slot Racer]

Pretty sure it was random, as I have a stocker, a lola, and a digital porsche that all have this motor.
You can tell it apart because it's solid white.