Here is what you gotta do. throw away the Nikko's and don't but them again. They are okay beginners cars, you cant find replacements or upgrades anywhere cause they are "toy-grade rc's". Buy the mini ERevo VXL instead of the Maverick BECAUSE the brand Maverick sounds like a Chinese brand (Exceed, Red Cat and a few others) and chinese brands are bad cause you usually cant find any upgrades and replacement parts are had to come by. The mini ERero VXL is 1,000,000 times better, durability, speed, replacement/upgrade wise. And you will also just flat out have more fun with it instead of the Maverick.