Hello, I have a 1/64 scale viper srt-10 and want to make it faster. As of now i just now that the motor has a pink end cap, have no idea what the stats are. What is the best motor and battery for 164 scale rc cars, as far as speed goes. I heard of a 4.0 42,000 rpm motor but cant find any motors anywhere. Im guessing the car has a 1/3 aaa battery