FLJ SK2 vs DUALTRON Storm New EY4 - Budget Beast Meets Polished Heavyweight

Fast Answer for Busy Riders ⚡ (TL;DR)

The DUALTRON Storm New EY4 is the more complete scooter overall: it rides more sorted, feels better put together, and backs its brutal power with mature safety, water protection, and brand support. It is the choice for riders who want hyper-scooter performance without feeling like a full-time test pilot or backyard mechanic.

The FLJ SK2 is for those who care almost only about euros-per-watt and don't mind living with rough edges, inconsistent finishing, and a bit more "hold my beer" energy in exchange for a lower price. If you like tinkering and want maximum drama per euro, it will tempt you.

If you can afford it and plan to ride seriously and often, lean toward the Storm. If your heart beats faster when you read spec sheets and your toolkit gets regular use, the SK2 might still be your kind of madness. Keep reading - the devil, and a few surprises, are in the details.

Hyper-scooters used to be rare unicorns. Today, they're more like a crowded biker bar: loud, fast, and full of characters. The FLJ SK2 and the DUALTRON Storm New EY4 sit at opposite ends of that bar. One is the suspiciously cheap guy in a leather jacket with a wild story; the other is the veteran with the expensive gear who's clearly been doing this for years.

I've put real kilometres into both: long suburban blasts, hill climbs that would make an e-bike cry, and plenty of battered city asphalt. On paper, they look oddly close - huge voltage, big batteries, monstrous motors. On the road, the differences are far bigger than the spec sheets suggest.

If you're torn between "maximum power for minimum cash" and "I'd like to survive this hobby with my sanity intact," this comparison is for you.

Who Are These For, and Why Compare Them?

Both scooters live in the hyper-scooter class: serious speed, huge batteries, and weights that make the word "portable" sound like a bad joke. They're for riders who want to mix it with traffic, not just nip to the corner shop.

The FLJ SK2 plays the budget disruptor: same broad performance ballpark as big-name machines, but at a mid-range price. It's aimed squarely at riders who think paying for brand, apps, and polish is overrated.

The DUALTRON Storm New EY4 is a premium flag-bearer: famous name, removable battery, refined cockpit, better water resistance, and much higher price. You pick it when you want something that feels like a finished product, not a hot-rodded project.

They compete because, if you want a 72V beast and can stretch your budget, your head will say "Storm" while your wallet whispers "SK2". Let's see which voice deserves more trust.

Design & Build Quality

When you first walk up to the SK2, it looks like someone cross-bred a scooter with a small pit bike. Those 13-inch fat tyres and the industrial chassis scream "DIY streetfighter". There's a certain brutal charm to the exposed metal, oversized hardware and light-show deck, but up close the finishing tells a different story: welds are functional rather than pretty, some plastics feel a bit bargain-bin, and you very much get the "tighten everything on delivery" vibe.

The Storm New EY4, in contrast, feels engineered rather than assembled. The aviation-grade frame has cleaner machining, the folding hardware looks more deliberate, and the wiring and cockpit feel far better integrated. Nothing is fancy in a luxury sense - it's still a bruiser - but tolerances are tighter and the scooter feels like it left a factory with a proper QA checklist, not just a stopwatch.

Ergonomically, the SK2's cockpit is straightforward: big LCD, chunky switches, and a layout that works but doesn't thrill. The Storm's EY4 display, wider bars and integrated controls feel much more modern. You sense that someone thought about how you'd actually live with it every day, not just how to bolt the fastest stuff onto a frame.

If you judge by sheer visual presence, the SK2 absolutely wins the "what on earth is that?" award. If you judge by consistency, materials and assembly quality, the Storm pulls ahead clearly.

Ride Comfort & Handling

Both scooters are heavy, long and stable - but they go about comfort very differently.

The SK2 relies on its big 13-inch pneumatic tyres and hydraulic shocks to smooth things out. On regular city roads, it's actually quite plush: you can roll over broken pavement and mild potholes without feeling like your spine's being itemised. The broad, illuminated deck gives plenty of room to move your feet around, and if you spec the seat, it becomes a laid-back cruiser that eats medium-distance trips comfortably.

The downside is precision. Those huge tyres add gyroscopic stability but also a little sluggishness in tight manoeuvres. Quick lane changes feel more like steering a compact moped than an agile scooter. It's stable at speed, but you're aware of the mass and the fat rubber when you need to thread gaps or dodge surprise craters.

The Storm New EY4 sits at the other end of the spectrum: firmer, more controlled, more "sports car" than "SUV". The rubber cartridge suspension doesn't plush out big hits the way the SK2's hydraulics do, but it keeps the chassis tidy. At speed, the wider bar and stiff setup let you carve sweeping corners with real confidence. On long, fast stretches, it feels more planted and precise than the SK2.

On rough cobbles and badly patched streets, though, you pay for that sportiness. The Storm transmits more of the nastiness into your legs. After a few kilometres of truly horrible pavement, the SK2 leaves you more relaxed; after the same distance on the Storm you'll have more control, but your knees may write a mild complaint.

Performance

Both scooters belong to the "who thought this was a good idea on two small wheels?" class of acceleration.

The FLJ SK2 punches hard from the moment you touch the throttle. With its high-voltage dual-motor setup, full-power starts feel violent if you're not ready. It's the kind of scooter where your first launch in dual-motor Turbo can easily end in a surprised yelp and an abrupt throttle roll-off. Once rolling, it continues to pull enthusiastically well into speeds that make bike lanes a distant memory. Hill starts on nasty gradients feel almost disrespectful to physics - it just goes.

The Storm New EY4 is even more serious on paper and feels it in the real world, but in a slightly more disciplined way. The torque hit is ferocious, yet with the EY4 settings you can tame how the power arrives. Dialled up, it's completely capable of embarrassing motorbikes away from the lights; dialled down, it becomes powerful but predictable. On long high-speed runs, the Storm holds speed more confidently and feels less like it's working at the limit than the SK2.

Braking is where the difference in maturity really shows. The SK2's hydraulic discs have strong bite, and on a straight, dry road they haul this heavy animal down well. But lever feel and consistency can vary from unit to unit, and you're relying mostly on the mechanical setup without much electronic assistance.

The Storm's branded hydraulics, larger rotors and added magnetic braking give you more headroom and better modulation. Hard emergency stops feel calmer and more controlled, and on long descents, having motor braking to share the workload makes a noticeable difference. At the speeds both of these can hit, that extra margin matters more than whatever the spec sheet says about watts.

Battery & Range

On paper, both scooters promise heroic distances. In reality, and ridden like real people ride big toys - with frequent throttle abuse - they land in similar "proper long day out" territory, but with different personalities.

The SK2's high-capacity pack gives it the stamina for very long mixed-use rides, especially if you behave yourself with Eco mode. Cruise at moderate speeds and it will keep going long after entry-level scooters have been on the charger, cooled down, and watched half a Netflix series. Push it hard, and the big voltage helps it hold performance reasonably well until you get deeper into the battery, but you will see range drop rapidly if you treat every straight like a drag strip.

The Storm's removable LG pack plays the quality card. It's slightly smaller on paper than the SK2's typical big-pack configuration, but the cells are premium, and the efficiency is respectable for such a powerful machine. In realistic fast riding - keeping up with traffic, overtakes on tap, no real hypermiling - the Storm goes reassuringly far, and more importantly, it does so repeatably. Add the option of owning a second battery, and the theoretical total range jumps into "you'll run out of daylight before you run out of juice" territory.

Charging is another big differentiator. The SK2 can make use of dual chargers, but you're still looking at a full night on the wall for a proper empty-to-full session. It's workable for daily use, as long as you're disciplined. The Storm ships with a fast charger that knocks charging down to a single-digit number of hours, which feels dramatically more civilised. Roll home with the pack low, pull the battery, plug in indoors, and you're back to full by the time you're ready to go again.

If you fear range anxiety more than you fear bills, the Storm's removable pack and better charging speed are easier to live with. If you just want the largest possible stationary battery for the money and don't mind long charges, the SK2 still has its appeal.

Portability & Practicality

Let's be honest: neither of these is "portable" in the usual sense. They're both heavy enough that carrying them up more than a couple of steps feels like a workout video.

The SK2 is simply a brute. Its long wheelbase, fat tyres and overall heft make it awkward to drag in and out of cars or up ramps. Yes, it folds, and yes, the bars fold too, but once folded it's still a big, dense lump of metal and rubber. If you have level access from your door to the street and a garage or wide hallway, fine. If stairs or narrow lifts are involved, you will come to resent its mass quickly.

The Storm New EY4 isn't light either; it's in the same ballpark in terms of total mass. But the removable battery changes the game. Being able to separate the heaviest chunk from the chassis means you can realistically leave the frame in a bike room or garage and only carry the pack indoors. The folding mechanism is more confidence-inspiring, and the scooter is just that bit easier to wrestle into a car or corner because it feels more balanced and better finished.

Day-to-day, the Storm also wins on "not needing extra stuff strapped onto it". The integrated lights, horn, indicators and display all work well enough that you're not instantly planning a shopping list of upgrades. With the SK2, many owners end up tinkering: better bell, sometimes extra lighting tweaks, a bit of DIY waterproofing - little things that eat evenings.

Safety

Both scooters can go fast enough that safety isn't optional, it's survival.

The SK2 does a decent job of stacking the basics: powerful hydraulic brakes, huge tyres for a big contact patch, and seriously bright lighting. The quad-front headlights and glowing deck give you strong visibility at night - to the point where cars often treat you more like a small motorcycle than a scooter, which is no bad thing. Stability at speed is acceptable, helped by the big wheels acting like gyroscopes.

But safety is also about predictability and refinement. The SK2's throttle is aggressive and not especially subtle. At low speeds, it can feel a bit twitchy, which makes tight traffic, slow manoeuvres and wet surfaces more stressful than they need to be. Add in the variable quality control - things like bolts that need a once-over from you, not the factory - and you get a machine that can be safe, but demands more mechanical attention and riding discipline from its owner.

The Storm New EY4 stacks safety features with more intent. The braking system feels stronger and more controlled, the magnetic brake adds another layer of security, and the wider bar plus improved geometry really do calm down the classic high-speed wobble risk. The lighting package isn't just decorative - those headlights genuinely light the road, and the side and rear visibility are very good straight from the box.

Add proper water protection on the chassis and display, and you're far less stressed about that inevitable rainy ride home. With the SK2, you ride around puddles and plan routes when clouds look threatening. With the Storm, you still avoid stupidity, but you're not terrified of a passing shower frying your cockpit.

Community Feedback

Price & Value

This is where the SK2 loudly clears its throat. For what you pay, you get voltage, motor output and battery capacity that would normally sit in a much higher price bracket. If your primary metric is "euros per watt and Wh", the SK2 is hard to ignore. It is, in raw numbers, a lot of machine for comparatively little money.

But that saving is not free. You're paying with your own time and tolerance for imperfections. Out-of-the-box checks are not optional; think of it as a kit that happens to arrive mostly assembled. If you're the sort of person who routinely services their own brakes and doesn't panic at the sight of a multimeter, that trade might be perfectly acceptable. If you just want to ride and let someone else deal with the headaches, less so.

The Storm New EY4 costs roughly the price of a decent used car. Purely on a spreadsheet of watts and Wh, it loses to the SK2. But your money buys more than numbers: better components, a stronger dealer network, more polished engineering, faster charging and far better long-term parts support. It's not "good value" in the budget sense, but in the context of flagship hyper-scooters, it's a defensible purchase rather than a silly one.

In short: SK2 is the bargain bin with surprisingly shiny items, Storm is the premium shelf where you pay a lot, but you mostly get what you think you're paying for.

Service & Parts Availability

This is one of the most important differences - and one a lot of buyers only discover after something breaks.

FLJ, as a brand, leans heavily towards "hardware first, support second". Parts generally come from overseas, communication runs through sellers rather than a local distributor network, and you rely heavily on community guides for many fixes. Enthusiasts manage fine; casual riders can find the experience frustrating. If your SK2 becomes your daily transport, you need to accept that downtime might be longer and more self-managed.

DUALTRON sits almost at the other end. Minimotors has been around for a long time, and dealers across Europe stock common wear parts and even some harder-to-find hardware. You get more predictable warranty handling, easier access to pads, tyres, cartridges, controllers and so on, and a large ecosystem of independent shops who know the platform inside out. It's not perfect - local support quality still varies - but finding bits for a Storm in three years' time will be far easier than hunting down specific parts for an ageing SK2.

Portability & Practicality

(Practical aspects are partially covered above, but let's put it explicitly.)

The SK2 can replace a car or moped for many riders with an uncomplicated ground-level commute and a secure space to park. It's less practical for anyone needing multi-modal transport or who lives up multiple flights of stairs. Storage needs are serious: it eats hallway floorspace, and getting it in and out of tight lifts or small cars is, to put it kindly, "a chore".

The Storm, although similarly heavy, is more practical if your life involves buildings. The removable battery solves the "no socket in garage" problem and makes street-level parking far more viable. Its IP rating means you can confidently commute even when the forecast isn't your friend. In daily, boring, real-world terms, it's the easier of the two to actually live with.

Safety

(Also partly covered, but summarised head-to-head.)

Under emergency braking from motorway-adjacent speeds, I trust the Storm more. The blend of hydraulic and magnetic braking, plus the calmer chassis, makes messy situations slightly less dramatic. The SK2 can stop hard and fast, but the combination of twitchier throttle, lower refinement and less electronic assistance makes it far more dependent on rider skill.

In low-light conditions, the SK2's sheer volume of lighting makes you a moving disco - you are very visible. The Storm's headlights give you a clearer actual view of the road ahead, which frankly matters more when you're hunting for potholes at high speeds. Both are "seen"; the Storm helps you "see" better.

Pros & Cons Summary

Parameters Comparison

Final Verdict - Which Should You Choose?

After living with both, the DUALTRON Storm New EY4 is the one I'd recommend to most serious riders. Not because it's perfect - it isn't - but because it feels like a coherent vehicle rather than a spectacular collection of parts. It goes fast, stops hard, shrugs off daily use and bad weather, and has the backing of a mature ecosystem. You ride it, not manage it.

The FLJ SK2 is more of a wild card. If money is tight but you absolutely must have 72 V madness, and you're willing to fettle, tweak and occasionally swear at it in the garage, it can be a huge amount of fun. It offers outrageous performance for the outlay, but you are very much sharing the engineering work with the factory.

If this scooter will be your main transport, and your time and nerves matter, the Storm is the safer, saner bet. If this is your weekend toy and you enjoy the process as much as the ride, the SK2's chaotic charm might still win you over - just go in with your eyes, and toolbox, fully open.

Numbers Freaks Corner

These metrics show different philosophies: the SK2 crushes the "how much hardware per euro and per kilogram" game, while the Storm wins on power density, energy efficiency and how quickly it drinks from the charger. Price-sensitive tinkerers will gravitate toward the SK2's numbers; riders focused on performance per kilogram and day-to-day usability will appreciate the Storm's edge in efficiency, power delivery and charging.

Author's Category Battle

Overall Winner Declaration

In the Numbers Freaks Corner, the FLJ SK2 scores 6 points against the DUALTRON Storm New EY4's 5. In the Author's Category Battle, the FLJ SK2 gets 12 ✅ versus 27 ✅ for DUALTRON Storm New EY4.

Totals: FLJ SK2 scores 18, DUALTRON Storm New EY4 scores 32.

Based on the scoring, the DUALTRON Storm New EY4 is our overall winner. In the end, the Storm New EY4 feels like the scooter you can trust your daily life to: fast, composed and built with the kind of maturity that only comes from years of making mistakes and fixing them. It may not deliver the same giddy "I can't believe this was so cheap" thrill as the SK2, but it delivers a steadier kind of satisfaction every time you ride it and it just does what it's supposed to do. The FLJ SK2 is the wild fling - loud, outrageous and occasionally brilliant - but it asks more from you in return. If I had to pick one to keep long-term, to ride hard and rely on, I'd hand my keys to the Storm and sleep better for it.

That's our verdict when we try to stay objective – but hey, riding is mostly about emotions anyway, so pick the one that will make you look forward to your commute every single day.