I got a EB4 but its not an S2. I drove mine alongside a real car to check the speed and I was up to 45 mph. But then I changed my Tires from the original to a special mounted T-Maxx tires. I lost alot of top speed but I could go in places i couldnt go with original tires. Do you have an EB4, its the only buggy I've owned and its great. The hard thing is to find parts now, but the hobby store I go to has all I need, I guess Im lucky.