The truth seems to be coming out now!
He says the motor is tight and is starting to overheat and smell?! Doesn't sound like the Losi's fault to me.....
Stampy, in my experience either you are using motor screws which are too long, have meshed the teeth waaaaay too tight or you have an issue with your motor, I hope you're using 48DP pinions?? That was an assumption?? Also, you aren't sitting on the buggy when driving it are you?
That XXX4 had an extremely smooth drivetrain last week and I put new bearings in it prior to sending to you - also check the pinion is far enough onto the motor shaft as not to rub the drivebelt....other than that I can't think why you are getting heat problems with your motor? It is a 540 sized brushless you're using right? Wired up correcty?
Please don't use LiPo's near me!
Dan