Losi Promoto-SM 1/4 Super Moto Motorcycle FXR White RTR with

The Verdict

The 1/4-scale RC motorcycle that actually stays upright — most of the time

Most RC motorcycles are a joke. They fall over the second you touch the throttle, and you spend more time walking to pick them up than actually driving. The Losi Promoto-SM isn’t that. This is the closest thing to riding a real supermoto without leaving your driveway — provided you’re willing to pay for the privilege.

What’s actually in the box

Losi ships this Ready-to-Run (RTR), which means everything you need to ride is included. You get the bike itself in that striking white FXR livery, a Spektrum SLT2 2.4GHz transmitter, the 2S 5000mAh LiPo battery, and a charger. There’s no assembly required beyond attaching the front wheel and handlebar — about 10 minutes of work with a hex driver (which isn’t included, but you likely have one).

The scale is the headline here. At 1/4 scale, this thing is nearly 24 inches long and weighs in around 10 pounds. It’s not a toy you’ll lose in the grass — it’s a miniature motorcycle with real presence. The FXR bodywork is painted, not stickered, and the details like the brake rotors, chain, and spoked wheels are genuinely impressive up close.

How it actually rides

The Promo-SM’s party trick is its gyro-stabilized self-balancing system. A flywheel inside the chassis spins up and works with the steering servo to keep the bike upright. Here’s the honest truth: it works better than any RC motorcycle I’ve tested, but it’s not magic. Below about 5 mph, the bike still needs the gyro at full strength to stay up, and you’ll still have tip-overs in tight turns. Above that speed, it’s remarkably stable — you can actually let off the throttle and coast through corners.

The brushless motor is punchy. On the included 2S battery, you’re looking at 30-35 mph realistically, and the bike will wheelie if you’re aggressive with the throttle. Losi claims 40+ mph with a 3S battery, which the ESC supports — but you’ll need to buy that separately.

Rider feedback is immediate and intuitive. The steering is responsive, and the gyro does most of the heavy lifting. One Amazon reviewer put it well: “I was skeptical about the self-balancing thing, but it genuinely rides like a real bike. You lean into corners and it just… holds.”

What buyers love

The dominant theme in the 235 ratings (4.7 stars) is that this bike makes the RC motorcycle experience accessible. Multiple reviewers mention that they’d tried cheaper RC bikes and given up in frustration, only to find the Promo-SM actually rideable. One wrote: “My 12-year-old son can ride this. That’s all you need to know.”

The build quality also gets consistent praise. The metal chassis, oil-filled shocks, and sealed bearings feel premium. This isn’t a flimsy toy that’ll break on the first crash — though it will break if you hit a curb at 30 mph.

Where it falls short

Let’s be direct about the downsides. The run time is the biggest frustration — 15 minutes on the included 2S battery is generous. A second battery will cost you another $60-80, and you’ll want at least one. The charger included is a basic wall unit that takes over two hours to top up a depleted pack.

The price is the other elephant in the room. At over $500, this is competing with mid-range RC cars and drones. It’s absolutely worth it for someone who’s serious about RC motorcycles or wants an impressive display piece that also runs — but it’s not an impulse buy.

Who should buy this

• The RC hobbyist who wants something completely different from another buggy or truck. This is the one to get.
• The motorcycle enthusiast who wants a miniature version of a supermoto without the garage space. The details will scratch that itch.
• Not casual parents looking for a gift for a young kid. This is a hobby-grade machine, not a toy.

FAQ: What real shoppers ask

Q: Is this suitable for a beginner to RC? Yes, surprisingly. The gyro does a lot of the work, and you can dial it down as you improve. But it’s a $500 machine — you should be prepared to learn how to drive it carefully. Start on a flat, open surface.

Q: Does it come with everything I need? Yes, except for AA batteries for the transmitter, which is a bit cheeky at this price point. You’ll also want a hex driver for assembly — the one included in the kit is basic.

Q: Can I run it on grass? Short grass, yes. Anything longer and you’ll bog down and risk overheating the ESC. This is a street and dirt bike, not a lawn mower.

The Verdict

Buy it if you want the best RC motorcycle experience money can buy and you’re ready to spend real money on a real hobby. Skip it if you’re looking for a cheap novelty or a toy for a kid — this is a serious machine for serious enthusiasts.

Rating: 4.6/5 — loses points only for the short run time and the premium price tag. It’s the best in its class, and it’s not particularly close.

Where to Buy

👉 Check Price on Amazon →

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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.