I have to agree with kx250 here. No need to buy a rtr when you don't plan to use the electronics anyway.

You could get the Hyper7 tq, OS RG and a Jammin pipe and still be just at 400$

Only thing that I disagree with kx250 about is the fuel%. I think that running 25% in the RG gives enough power, whereas 30% reduces the lifetime. But that is just my opinion.

If you want to get rtr, then look at Hyper7 pbs or Jammin. No need to get the Mayhem, when you don't want to use the radio and servos as these are the Mayhems strongest assets. But doesn't Mayhem have an ARR version where you get the Pro-version with engine and pipe slightly cheaper than the regular rtr-version?