I was into RC Gas Trucks a few years ago. I ran the HPI Savage models...I still have 2 of them and can run them just about anytime. They always fire up. They sound like weed eaters from hell!!! They only had 2 speed transmissions when I ran them, now they have 3 speeds....My truck got up to around 40 mph right out of the box. Easily get it up to 50-55 now. They need tuning and maintence, but once you get the hang of it there is only a high speed and low speed adjustment - Pretty easy after you mess with it a bit. Check out HPI's website and see if any hobby stores around you carry that brand. Have fun and be prepared to spend $$$$ - I've probably spent wayyyyyyy too much, enough to buy a real vehicle or motorcycle