Razor MX650 Dirt Rocket Review

Every kids' electric dirt bike gets measured against this one, and most of them lose. The MX650 is the top of Razor's Dirt Rocket line: a 650-watt motor, chain drive, 36 volts of lead-acid battery, and a 17 mph top speed that is fast enough to require an actual conversation about where and how it gets ridden. The chain drive matters more than the spec sheet suggests — it delivers torque the way a real dirt bike does, with a mechanical directness that belt-drive and hub-motor bikes can't match. Kids notice. So do the neighbors, though far less than they'd notice a two-stroke.

Performance is the whole pitch. Seventeen miles per hour on knobby pneumatic tires means the MX650 handles genuine dirt — trails, fields, the loose stuff behind the fence line — not just the paved cul-de-sac. Hand-operated brakes front and rear give it real stopping power, and riser handlebars keep taller kids from folding into a shrimp position. The 220 lb weight limit is the quiet killer feature: it covers a growing teenager for years, and yes, it covers you. Test rides are for quality-control purposes. Obviously.

The honest limitation is runtime. Razor claims 40 minutes; real-world riding — actual throttle, actual hills, an actual kid — delivers 25 to 35. Then the lead-acid batteries want a long overnight recharge, which means one session per day unless you buy a second battery set. The bike also weighs close to 100 pounds. A 10-year-old cannot pick it up after a tip-over, and there will be tip-overs.

Razor stickers this 16+, which nobody has ever obeyed. Realistically it suits confident riders 10 and up with supervision and proper gear, and it fits teenagers outright. If your kid has outgrown the MX350's 14 mph or was never going to be satisfied by it, this is where you land. It's the default for a reason.