A Swedish startup's premium electric motocross weapon, built to chase the Stark Varg with KYB and Ohlins suspension and a sub-one-minute swappable pack. The catch is a tiny range, off-road-only status, and a delivery date that kept sliding. Sources on everything.
A genuine 85 hp race tool with brand-name suspension and a clever sub-one-minute battery swap, wrapped around a range so short it only makes sense at a track with spare packs. Plan for ~25 miles, less when pinned, ~85 hp peak that fades to a sustained cruise, off-road only, and a delivery window you should treat as a hope, not a contract.
Assumptions: off-road only (no registration or insurance), ~1,500 mi/yr equivalent, $0.17/kWh, low electricity due to the small pack, ~40% resale at year five, MX-grade tyre and brake wear. All estimates, USD and approximate. Full table in §10.
Every module behind the headlines: who it is for, claims vs. physics, true cost, reliability, parts, and the standard scorecard. All sourced.
A premium 85 hp electric motocross weapon from a Gothenburg startup, built to chase the Stark Varg: a 450V 7 kWh swappable pack, KYB 48 mm fork, Ohlins TTX rear, a featherweight motor making a claimed 553 lb-ft. It is also a not-yet-fully-shipped product. Plan for ~25 miles, less when pinned, off-road only, a delivery date that slid about a year, and the cost of spare packs to make real sessions work. Here is exactly how we get there.
Start here, the right answer depends entirely on who is asking.
Same bike, very different answer depending on the rider. We lead every report with this so nobody buys the wrong machine.
The sweet spot, and the only place the design fully makes sense. Premium suspension, strong claimed power-to-weight, and a sub-one-minute pack swap that turns the short range into a non-issue between motos, if you own spare packs.
This is built to compete in exactly that lane: high-output electric MX with brand-name kit. Worth a look on spec, but weigh the startup risk and parts network against an established rival before committing.
A ~25 mile range with no spare packs is a hard limit on a fun ride. Without the pack-swap workflow, you will spend more time charging than riding. The premium suspension is wasted on gentle trails.
Off-road only in base form, with no DOT lights, signals, or on-road VIN, plus a race-short range. This is not transport. A poor commuter on every axis.
Same bike, two stories. The struck-through line is what the listing tells you; the big number is what to actually expect. The "why" is in Part C.
What is genuinely clever, and which "innovations" are really table-stakes. The part the brand's own page never tells you.
The features that justify the price, rated honestly. Each badge tells you whether it is a real engineering edge, normal for a race e-MX, or marketing gloss.
You replace the 7 kWh pack from the right side of the bike with a fully charged spare in a claimed under-one-minute swap. For racing, fast pack swaps directly answer the short-range problem in a way slow charging never can.
★ Genuine edgeA KYB 48 mm fork and an Ohlins TTX rear shock, the kind of kit that costs real money to fit aftermarket. On a light aluminum frame, this is genuine race hardware, not budget filler.
✓ SolidFlux pitches active regen as a first for off-road. The virtual-clutch lever blends into regen as you release the throttle, recovering a little range and adding engine-braking feel. Useful, modest in effect.
✓ SolidA digital clutch removes a wear-and-overheat point and gives a clutch-like feel without plates. Clever, but rival e-MX bikes now offer the same idea, so it is smart rather than unique.
≈ Now appearing on rivalsA liquid-cooled motor with adjustable throttle and power maps lets the same bike suit a beginner or a pro. Helpful for sustained output, though tunable maps are increasingly common on serious e-moto.
≈ Now standard on serious e-motoMarketing specs vs. the physics. The math is simple, battery capacity and a few formulas, so let us run it.
Peak watts make a great headline; they are not what you sustain for a whole moto. Convert the claim to the unit everyone feels.
Flux quotes a featherweight ~7.7 kg motor making 63 kW peak and a claimed 750 Nm (553 lb-ft) of torque. Watts to horsepower is a fixed conversion:
This is the rare bike where the maker is honest: the range is short on purpose. Here is the arithmetic, and why hard riding cuts it further.
Step 1, real energy in the tank. Range starts with how much energy the pack holds. Flux lists a 450V, 7 kWh pack. With kWh and nominal voltage known, amp-hours follow:
Step 2, how much you spend per mile. A high-output MX bike dumps energy into the dirt fast. Working back from the ~25 mile claim shows just how thirsty it is, and how little headroom there is when you push:
Charge time is just battery size ÷ charger power. But on this bike, the point is to not charge at all between motos.
The baseline lists roughly 150 minutes to recharge the 7 kWh pack. Flux also describes an in-house three-phase "Monolith" charger claimed to take the pack from 10% to 80% in about 25 minutes. Run the standard estimate for a typical Level 2 wall charge:
Shopping for one of these, you will see a mix of numbers and a status that keeps moving. Here is how to read them.
| You will see | What it really is | Trust it? |
|---|---|---|
| 85 hp / 63 kW | Peak motor output. A burst figure, not a sustained-power rating, which Flux has not separately published. | peak only |
| 750 Nm / 553 lb-ft | Claimed wheel torque. Big number, explains the savage launch on a light bike. | maker claim |
| 450V 7 kWh | Pack spec. The headline feature is that it swaps in under a minute, not its size. | real spec |
| "~25 mi / 40 km range" | Honest short range for a high-output MX bike. Shrinks at race pace. | honest, pace-dependent |
| "production" | Flux stated production from Q4 2024, but deliveries slid to roughly Q4 2025. | verify current status |
| "Street legal" | Off-road / closed-course in base form. No on-road equipment as shipped. | off-road only |
The sticker is the smallest number in the story. Here is the whole bill.
The MSRP is a headline, not a checkout total. Here is what actually leaves your bank account on day one, all estimates around a roughly $12,650 baseline.
| Line item | Typical (est.) | Notes |
|---|---|---|
| Bike (baseline price) | $12,650 | Baseline figure; confirm region and edition |
| Shipping / freight | varies | Crate freight from Europe; confirm at order |
| Sales tax / VAT | varies | Region-dependent; some areas exempt off-road |
| Spare pack(s) | budget for it | Effectively required for real race sessions |
| Starter gear (helmet, boots, armor) | $300–$800 | Non-negotiable at MX speeds |
| Realistic out-the-door | ≈ $13,000+ | Before spare packs, before a single lap |
The number almost no one shows you. We itemize it, show the assumptions, and label every figure as an estimate so you can adjust it to your own riding.
| Cost over 5 years (est.) | Estimate | What drives it |
|---|---|---|
| Purchase (baseline) | $12,650 | Excl. gear; tax/freight vary by region |
| Gear (one-time) | $800 | Helmet, boots, armor |
| Electricity (charging) | $100 | Small pack, low use; math below |
| Tyres, brakes, consumables | $1,000 | MX eats tyres and pads |
| Battery (replace / upgrade) | $0 | None assumed in 5 yr |
| Insurance / registration | $0 | Off-road only |
| 5-year total (before resale) | ≈ $14,550 | |
| Resale value (yr 5) | − $5,000 | ~40% of price; unproven for a new startup |
| Net true cost to own | ≈ $9,850 | ≈ $1,970 / year, estimate |
What is praised, what is flagged, and whether you can get parts.
There is no owner fleet to read yet, so we summarize what the press consistently praises and flags, and we do not invent owner quotes.
A bike is only as ownable as its parts supply. Here the picture is mixed: brand-name wear items, but a startup behind them.
The Primo uses brand-name KYB and Ohlins suspension, which eases some consumables because those components have their own service networks. But Flux is a small startup with no established dealer or parts network of its own, so OEM-specific parts, the pack, the controller, the motor, would route through the maker, and support depth is unproven. We rate parts fair: better than a no-name build because of the suspension brands, weaker than an established manufacturer because the company itself is new.
| Part category | Availability | Rough cost |
|---|---|---|
| Suspension service (KYB / Ohlins) | good | via suspension specialists |
| Tyres, brakes, consumables | good | standard MX parts |
| OEM pack / spare batteries | via maker | varies; budget for spares |
| OEM motor / controller / electronics | maker only, unproven | varies; via Flux |
One scorecard, identical axes on every bike.
Every e-moto on the site is scored on these same eight axes, by the same rules, so a 6 here means the same thing as a 6 anywhere.
Our standing methodology, run identically on every e-moto, including bikes we would otherwise have reason to flatter.
The only honest way to compare two batteries. A 450V pack at 7 kWh works out to about 15.6 Ah.
You never use 0 to 100%. The BMS holds a reserve and voltage tapers at the bottom. We assume ~88%.
Consumption is the lever, and MX riding is thirsty: ~246 Wh/mi just to hit the claim, far more pinned.
Always ask which number a spec quotes. Peak sells bikes; continuous moves them. Flux quotes peak.
"Fast charging" is meaningless without the charger's wattage. The ×1.1 covers losses and taper.
| Cost assumption | We used | Change it if… |
|---|---|---|
| Annual mileage | ~1,500 mi/yr equivalent | You race more → tyres & consumables rise |
| Electricity rate | $0.17 / kWh (US avg) | Your utility differs |
| Sales tax / duties | region-dependent | Imports and VAT vary; confirm locally |
| Battery life | No replacement in 5 yr | Very hard use → sooner |
| Resale | ~40% at yr 5 (unproven) | New maker, no resale history yet |
We cite everything and date it, because specs, prices and tariffs change. Manufacturer figures are labeled as claims; real-world numbers are our estimates from the methodology above. Spot an error? Our corrections policy means we fix it in public.
Sources retrieved May 2026. The Primo is a startup product whose production status and delivery dates have moved; treat manufacturer pages as marketing figures, not independent tests, and re-verify price, availability and import duties before relying on them.