Ok, now i understand your problem. I've already seen your Revo, the motor is really large. I don't think that you should get much more cogging if you go up to the 3.3:1 ratio. Have you already added some caps to your Quark? I think that they would help to reduce cogging.

In the beginning, I added a huge bank of Capacitors. LOL Now I just have 1 additional Novak 2700uf cap. It seems to work great as the Quark 125 runs very cool.


http://i160.photobucket.com/albums/t...m/DSC06680.jpg

You are using the stock Traxxas radio!? Don't you have range issues or something like that?

Yes I'm using the stock radio system. No range issues or any issues at all.

It's been working great for me.