razor mx650 adult & teen dirt rocket ride on high-torque electric motocross motorcycle dirt bike, speeds up to 17 mph with kids full face helmet, black razor tear up the track just like a real supercross rider with the razor mx650 electric dirt rocket kids moto bike! razor products are in neighborhoods everywhere, but they don't stop where the sidewalk ends. with the dirt rocket line, razor introduced off-road rides for those who aren't afraid of the dirt. the razor mx650 dirt rocket is a high performance, electric-powered dirt bike with authentic dirt bike frame geometry and supercross inspired styling. with a high torque powerful 650-watt electric motor, large 16-inch and 14-inch pneumatic knobby tires for maximum power transfer, shatterproof plastic fairings and fenders, dual suspension and speeds up to 17 miles per hour, and up to 40 minutes of continuous use, you'll be the king of the dirt hill. this package includes a kid's full face helmet perfect for biking, skating, or other outdoor sports. it has ergonomically designed foam padding and 17 vents to keep heads cool, safe, and comfortable. the helmet meets cpsc standards for safety, so you can rest easy while your child is out riding. it fits head sizes 21.5 to 22.5 inches around and has extra padding to fit securely.