It's a pro zinger and to be honest I haven't tached it.. If I had to guess I would say around 8500 - 9000, does that seem right?... I didn't really by it for 3D and it flies great the way it is.... I bought to get my feet wet in the larger stuff. I wonder how this motor would be in a 68" EF Yak?? Maybe after the Extra dies I'll have to get one