They seem inefficient and underpowered to me. I have tried other budget motors that are only slightly more expensive than the Racerstars. They have all felt better than the Racerstars. I have had no durability issues with them. But I am going to switch to different motors when I get the chance .

What budget motors have you tried? RCX? DYS?

Aokfly, DYS Samguk, KwadBox CheePass. I haven't gotten any RCX yet. I will soon also try AMAXinno and the cheaper HyperLite.

Out of Racerstar and three others I have tried I would rank them best to worst:

1. Aokfly
2. CheePass
3. DYS Samguk
4. Racerstar

Aokfly is not very surprising since it costs about 50% more. It feels closer than other motors in performance to a high-end motor, like BrotherHobby, to me. CheePass is the cheapest and I like it better than DYS Samguk. Had to replace a DYS Samguk already due to stripped motor base threads. The aluminum was very soft on mine. CheePass isn't the best performing motor at all but it is good enough for Freestyle and it has been very durable. It also comes with very long wires. Racerstar wire must always be extended if using a 4in1 ESC. That is kind of annoying. That lack of wire length plus lack of performance puts them at the bottom for me.

I expect either the AMAXinno or HyperLite to be contenders for the top spot based on the data I have seen. RCX too. I have no personal experience yet though.

I have also been meaning to try the new EMAX Lite Specs. I think those should be good.

Glad to hear results and comparisons from someone who has owned most of the popular budget motors. Id recommend u try the rcx rs2206. Im surprised to hear about the cheepass motors being high on your list, as the people ive talked to who have owned the motor say it doesnt produce enough thrust to be worth it.

My freestyle builds are usually very lightweight ones like this one. So I guess the CheePass is just good enough. Even with the different stator sizes and Kv, CheePass might win. Looking at the thrust tables that are available. This Racerstar motor only produces a tiny bit more thrust. But this Racerstar is much heavier and a little bit less efficient. The DYS Samguk, to me, seems to just be a Racerstar in an prettier lighter naked-bottom package.

There are other very humorous things about this build that weren't intentional, like the 17 sma adapters on the vtx antenna and the and the receiver antennas being sacrificed to the propeller gods. But I am proud to say that the Racerstar motor thing was totally intentional. I don't think that KababFPV will care at all though. I did it just to entertain myself.

http://pirofliprc.com/10CM-SMA-Pigtail-WUFL-Connector_p_3601.html or you could zip tie the antenna mast to the frame out the back to save weight and use what you got on hand (removing all those sma adapters). also, you could save your reciever antenna by just taping them to your arms beside your motor wires. maybe not the 'best' but they are less likely to get the chop, ive run like this and dont have much of a reception issue doing that.

Yeah, I need to fix that. I was attempting to use the same zip ties that I sued to secure the VTX/receiver stack to also secure the antennas. Didn't work so well. I think I am just going to move them to same orientation but under the arms.

For now I just hit the zip ties with a heat gun and turned them down toward the ground and pushed them down as far as I could on the standoffs. The mini stack in between the standoffs is where the VTX and the receiver are mounted. Added additional photos.