Quick answer: For kids, electric wins on safety, running cost, noise, maintenance, and where you can legally ride. Petrol kids dirt bikes still have a place for older teens chasing peak performance, but for 95% of UK families with kids aged 3 to 16, a modern electric bike like the Kubbi range is the smarter, safer, cheaper choice.
Petrol kids dirt bikes dominated the market for 20 years. In 2026, that's flipped — electric models now outsell petrol kids bikes in the UK, and once you compare them side by side it's not hard to see why. Here's the honest breakdown.
Where Electric Beats Petrol (6 Wins)
1. Safety — parental speed limiters
A petrol kids dirt bike has one speed setting: as fast as the engine will go. A modern electric bike like the Kubbi K7 Pro has 2 or 3 parent-set speed modes. You decide whether your 8-year-old rides at 10 mph or 18 mph. This single feature has done more for kids dirt bike safety than any helmet upgrade in the last decade.
2. Noise — you keep your riding spot
A 50cc kids petrol bike puts out roughly 85–95 dB — loud enough that neighbours complain, fields ban them, and many private landowners refuse to host them. A Kubbi electric bike is virtually silent (around 55 dB — quieter than a conversation). You can ride in your garden without losing friends.
3. Running cost — £5/year vs £150+/year
A Kubbi K7 Pro costs roughly £5 per year to charge, even with regular weekend rides. A petrol equivalent burns through £150+ a year in fuel and 2-stroke oil. Over a 3-year ownership, electric saves you around £450.
4. Maintenance — plug it in vs service it
Petrol kids dirt bikes need regular spark plug changes, carb cleaning, air filter swaps, fuel line maintenance, and chain oiling. Electric bikes have one moving system: motor and battery. Kubbi bikes get serviced roughly once every 12 months, mostly just for brake pads and chain tension.
5. No clutch, no kick-start
One of the biggest reasons kids give up on petrol bikes is the clutch. Electric is twist-and-go. A 4-year-old can ride a Kubbi K4 within 30 minutes of unboxing. A 4-year-old learning a petrol bike usually gives up after a frustrating afternoon.
6. Instant stop
Release the throttle on an electric bike and the motor cuts instantly. Petrol engines idle — the bike keeps creeping forward even with the throttle off. For new riders, that idle-creep is a hidden hazard.
Where Petrol Still Wins (Just About)
Range on a single tank
A petrol kids bike can do 3–4 hours of mixed riding on one tank. A modern electric like the Kubbi K10 Pro does 70–90 minutes per charge. For most family sessions, that's plenty — kids rarely ride flat-out for hours. But if you're heading to a full weekend MX camp, petrol genuinely has the edge here.
That said, many Kubbi owners just buy a second spare battery (around £75 from our spare parts page) and swap mid-ride, doubling range for less than the cost of two tanks of petrol.
Cost Comparison Over 3 Years (Real Numbers)
| Cost over 3 years | Electric (Kubbi K7 Pro) | Petrol 50cc kids bike |
|---|---|---|
| Bike | £384.99 | £450–£700 |
| Fuel / charging | ~£15 | ~£450 |
| Servicing | ~£50 | ~£300 |
| Oil/spark/filters | £0 | ~£120 |
| Total | ~£450 | ~£1,320–£1,570 |
Electric saves you about £900–£1,100 over a typical 3-year ownership.
Safety Comparison
Electric wins on every safety metric:
- Adjustable parental speed limiter — electric only.
- Hot exhaust pipe — petrol burns; electric has nothing to touch.
- Kill-switch lanyard — both have it, but electric responds instantly. Petrol takes a few revolutions to stop.
- Idle creep — petrol has it (engine running with throttle off); electric does not.
- Falling over — a petrol engine keeps running when the bike falls. Electric cuts via lanyard.
The Kubbi Electric Range (By Age)
Ages 3–7: Kubbi K4 (150W)
The Kubbi K4 is the perfect first electric dirt bike for ages 3 to 7. 150W motor, 12 mph top speed (with adjustable parental crawl mode), 12-inch pneumatic off-road tyres. From £284.99.
Ages 6–10: Kubbi K7 Pro (300W)
The Kubbi K7 Pro is the most popular kids electric dirt bike in the Kubbi range. 300W, 18 mph top, three speed modes, hydraulic disc brakes. £384.99.
Ages 8–14: Kubbi K10 Pro (800W)
The Kubbi K10 Pro is the bike most kids upgrade to next. 800W, 25 mph top, dual suspension, full-size 14-inch wheels. £584.99.
Ages 14–18: Kubbi K22 (2000W)
The Kubbi K22 is a full-size electric motocross bike for teens. 2000W, 30+ mph, 50 km range per charge — properly fast, still with parental speed control. £999.99.
When Petrol Actually Makes Sense
To be fair to petrol: if you have a 16+ year old serious motocross competitor who races every weekend, needs full-day endurance, and rides at MX tracks where electric bikes haven't yet been accepted — a 65cc or 85cc petrol bike still wins. But that's a tiny percentage of UK families.
For everyone else — first-time riders, casual weekend riders, beginners through to confident teens — electric is the right call.
Frequently Asked Questions
Are electric dirt bikes for kids better than petrol?
For most UK families, yes. Electric wins on safety (parental speed limiter), running cost (£5/year vs £150+), noise (silent vs 90+ dB), and ease of use (twist-and-go vs clutch). Petrol still has the edge on single-charge range for serious competitive riders.
How much cheaper is electric to run than petrol?
Roughly £300–£400 per year less, depending on usage. A Kubbi K7 Pro costs about £5 a year to charge; a petrol equivalent burns £150+ in fuel plus oil and servicing costs.
Are kids electric dirt bikes powerful enough?
Yes. A Kubbi K10 Pro at 800W delivers more usable torque than a 50cc petrol kids bike, with smoother power delivery. The K22 at 2000W matches 110cc petrol performance.
How long does an electric kids dirt bike last vs petrol?
Electric bikes have far fewer moving parts and last longer with less maintenance. Petrol kids bikes need engine work every few hundred hours of riding; Kubbi electric bikes typically run for years with just brake pads and chain maintenance.
Can you ride electric dirt bikes anywhere petrol can be ridden?
Anywhere petrol can go, electric can go. And electric can go in many places petrol can't — quiet residential areas, sound-restricted private land, and parks where motor noise is banned.
The Bottom Line
For UK families, electric is the smarter choice in almost every scenario. Lower running costs, dramatically safer for kids, quieter, easier to ride, easier to maintain. The Kubbi range covers every age from 3 to 18, all with the same parental safety features.
Browse the full Kubbi electric dirt bike range, or call 0330 043 2474 for advice.