I had a RTR Losi 8ight 2.0 and the stock motor liked to run (for me) around 260. Try as I might to get it to run cooler, I couldn't with it still running well, it would end up running like shit.

I ran it at 260F for about 3 gallons of fuel before I sold it with no issues, it ran very stable.

So take that as you will.