when i brake my nitro savage 25 my engine shuts off. how do i stop it from turning off? thanks

You need to adjust the idle with the idle needle and you have to make sure the carb is always open (around 1mm) even with brakes on.

the idle needle is the low speed needle right?

No, this is the idle screw:

+1
More detail-
Take off air cleaner turn on radio and look in carb.
Start turning in the idle screw on the carb until you can hit the brakes without the carb slide moving closed.
ALWAYS set your idle mechanically on the carb.
Never do the final settings on your remote.

SLAYER

ok  thanks alot! i finally got it to to brake without shutting off