razor mx400 dirt rocket kids ride on 24v electric toy motocross motorcycle dirt bike, speeds up to 14 mph, black razor your kid isn't afraid of a little dirt. the razor mx400 dirt rocket is ideal for kids and teens ages 13 years and older who want to enjoy a revved-up version of the off-road dirt bike experience. this dirt bike is a high performance, electric-powered, scaled-down motocross bike with authentic dirt bike frame geometry and supercross-inspired styling. with a high-torque, powerful 350-watt electric motor, large 12-inch pneumatic knobby tires for maximum power transfer, speeds up to 14 miles per hour, and up to 30 minutes of continuous use (up to 10 miles on a single charge), you'll be the king of the dirt hill. the road (and the fun) doesn't stop where the sidewalk ends and your kid can explore it with the razor mx400 dirt rocket.