A patented-aero plug-in hybrid three-wheeler built for police first responders, decoded honestly: how the Venturi duct works, why this is a hybrid and not a pure EV, and exactly which specs are confirmed versus still unpublished. Sources on everything.
A clever, genuinely novel plug-in hybrid three-wheeler built for a specific fleet problem, with a real police pilot to back it up. It pairs a 292cc petrol single with a 5 kW electric motor and two removable batteries. Calling it an EV would be a stretch: it runs on battery only at low speed, then on petrol. It is a fleet and trials machine, not a showroom product, so several headline specs are simply not published.
What we can say: the whole point is reduced fuel burn and emissions in urban use, with WMC claiming around a 50% cut in carbon emissions versus a comparable machine and roughly 104 mpg urban. Those are maker targets framed against comparable performance, not independently audited figures. Treat them as engineering goals. Full notes in §5.
Every module behind the headlines: what it actually is, the Venturi duct decoded, how the hybrid works, the concept status in plain terms, and a clear verdict. All sourced, with unconfirmed specs flagged.
The WMC300FR is a three-wheeled plug-in hybrid scooter from White Motorcycle Concepts in Northampton, UK, built specifically for emergency-services use and based on the Yamaha Tricity 300 platform. It pairs a 292cc four-stroke petrol single with a 5 kW electric motor and two removable 56V 12Ah battery packs, running on battery alone at low speed. Unveiled in December 2021, it went into a real police pilot with Northamptonshire Police (fleet committed in October 2022). This is a purpose-built fleet machine, not a consumer EV, so treat any spec beyond the verified basics as unconfirmed.
Start here, the honest answer for almost everyone is "this is not a bike you can buy."
This is the most important module on the page, because the WMC300FR is not a consumer product. We lead with this so nobody shops it as one.
The intended user, full stop. It offers low-emission, low-noise capability in pedestrianised urban zones, then petrol for the dash across town. The case is operational: silent approach, clean running, and the range security of an engine.
Beyond police, any fleet that needs clean, quiet operation in city centres with the fallback of petrol range could in principle use the platform. The Venturi-aero efficiency idea is the draw. It remains low-volume and build-to-order.
For most readers, the interest here is the patented Venturi duct as a proof of concept, an idea WMC has since explored in other prototypes. Worth watching as engineering, not as a bike you will own.
If you are reading this as a prospective buyer, the honest answer is that this is a fleet and trials machine. There is no showroom, no consumer price, and no dealer support. It is not a bike for the rest of us, and we will not pretend it is.
The struck-through line is the easy assumption; the real line is what the WMC300FR actually is. Several numbers are genuinely unpublished, and we say so rather than guess.
What is genuinely clever here, and how to read the maker's claims about it.
The WMC300FR earns its place on one big idea and a couple of sensible supporting ones. Each badge tells you whether it is a real engineering edge or a maker claim to verify.
The signature feature: a channel that runs through the bike, directing airflow between the two front wheels to cut aerodynamic drag instead of pushing air around the machine. WMC says this improves efficiency, with claims of up to ~50% lower emissions and ~104 mpg urban versus a comparable bike. Genuinely novel, and patented.
★ Genuine edgeTwo 56V 12Ah lithium packs (reported as EGO Power+ units) provide electric drive below roughly 30 mph and live in a rear topbox in place of a pillion seat. Because they lift out, charging does not depend on parking next to an outlet, a real fleet practicality.
✓ SolidFor first responders, the appeal is moving silently and cleanly through pedestrianised areas on battery, then switching to petrol for higher speed. That dual nature is the whole operational pitch, and it is a sensible answer to a specific problem.
✓ SolidLaunch reporting noted the duct and top box made from recycled aerospace-grade carbon fibre. A nice sustainability touch on a vehicle whose pitch is lower emissions, though it is a construction detail rather than a performance edge.
✓ SolidUnlike a pure render, the WMC300FR's existence is validated by a committed police fleet trial. That real-world deployment is itself a credibility marker for the aero idea, even though the bike is not a retail product.
★ Genuine edgeHow the hybrid works, what the aero claim really means, and which numbers we simply cannot verify.
The single most important fact about this machine: it is a plug-in hybrid, not a pure EV. Here is the division of labour.
The WMC300FR is built on the Yamaha Tricity 300 platform and uses its 292cc single-cylinder four-stroke petrol engine. Alongside it sits a 5 kW electric motor fed by two removable 56V 12Ah packs. The electric side provides drive below roughly 30 mph, improving low-speed acceleration and efficiency; above that, the petrol engine takes over.
The headline numbers, ~50% lower emissions and ~104 mpg urban, are the most quotable and the most worth reading carefully.
WMC's patented duct forces air through the bike rather than around it, lowering aerodynamic drag. Lower drag means less energy spent fighting the air, which the company links to both better efficiency and improved top-speed potential. The standout figures from launch reporting are a targeted ~50% reduction in carbon emissions versus a conventional machine of similar performance, and an urban economy figure of around 104 mpg.
Because this is a low-volume fleet machine, several specs a normal report would list are simply not available. We name them rather than fill them with plausible guesses.
| Spec | What is known | Status |
|---|---|---|
| Top speed | Electric drive below ~30 mph; petrol handles higher speed. No definitive combined top-speed figure published for this hybrid. | not published |
| Electric-only range | Two 56V 12Ah packs, but no confirmed battery-only range figure. | not published |
| Kerb weight | Based on the Tricity 300 platform plus extra hardware, but a confirmed weight for the FR is not published. | not published |
| Seat height | Not published for this build; the rear packs occupy the pillion area. | not published |
| Electric motor power | 5 kW peak electric assist. | confirmed |
| Engine | 292cc single-cylinder four-stroke (Tricity 300 unit). | confirmed |
| Emissions / mpg | ~50% lower emissions, ~104 mpg urban. | maker claim |
The cost story here is operational, not a personal 5-year total. Here is what actually exists.
This is a pilot-stage emergency-services vehicle, not a showroom product. Its credibility comes from a real fleet trial, not a price list.
The WMC300FR was unveiled in December 2021 and developed in conjunction with Northamptonshire Police, who committed to a pilot fleet, with production of that fleet reported as beginning and deliveries following in October 2022. It is described as the first emergency service in the world to order a fleet of this type of vehicle. Reporting put the build-to-order machine in the region of £14,000, but it has no consumer MSRP, no dealer network, and no out-the-door checkout the way a production bike would.
| Cost / status item | What we can verify | Notes |
|---|---|---|
| Consumer price | none | Not sold to private buyers |
| Build-to-order figure | ~£14,000 | Per launch reporting; fleet, not retail |
| Availability | build-to-order | Low-volume, fleet-focused |
| Validation | police pilot | Northamptonshire Police fleet, Oct 2022 |
| Personal 5-year cost to own | not applicable | This is a fleet vehicle, not a consumer purchase |
For a fleet machine, "living with it" means support and the platform it is built on.
There is no owner-forum reliability record for a low-volume fleet trike, so we report what is structurally true rather than inventing themes.
Parts availability splits cleanly into the donor platform (well supported) and the bespoke WMC hardware (specialised).
The petrol engine and much of the rolling chassis derive from the Yamaha Tricity 300, so those consumables and service items follow a well-supported mainstream platform. The Venturi duct, recycled-carbon top box, electric drive, and battery integration are bespoke to White Motorcycle Concepts and route through them. The removable packs are reported as EGO Power+ units, a consumer power-tool battery line, which is an interesting, pragmatic choice but should be confirmed for any specific build.
| Part category | Availability | Notes |
|---|---|---|
| Petrol engine / chassis (Tricity 300) | well supported | Mainstream Yamaha platform |
| Battery packs | specialised | Reported EGO Power+; confirm per build |
| Venturi duct / carbon body | bespoke | Via WMC only |
| Electric drive / integration | bespoke | Via WMC only |
One scorecard, identical axes on every bike, scored honestly for what this machine actually is.
Every machine on the site is scored on these same eight axes. For a fleet-only hybrid concept, several axes are framed by that reality, and we say so rather than flatter it.
Our standing methodology, run identically on every machine. On a hybrid, only some of it applies, and we say which.
Each pack is 56V × 12Ah (about 672 Wh); two packs roughly double that. The electric side only drives below ~30 mph.
You never use 0 to 100%. The BMS holds a reserve and voltage tapers at the bottom. We assume ~88%.
Not applied here: this is a hybrid, and a battery-only range figure is not published. Petrol covers higher speeds.
The 5 kW electric motor is about 6.7 hp of assist; the 292cc petrol engine supplies the higher-speed power.
Not computed: the charger wattage for the removable packs is not published, so we will not invent a time.
We cite everything and date it, because specs and status change. Manufacturer figures are labeled as claims; unconfirmed specs are clearly marked "not published" rather than guessed. This is a low-volume fleet machine, so several numbers a production bike would list are simply unavailable, and we say so. Spot an error? Our corrections policy means we fix it in public.
Sources retrieved June 2026. Manufacturer pages and launch reporting state claimed specs; treat them as targets, not independent tests. Top speed, kerb weight, seat height, and electric-only range were not published for this build and are flagged as such rather than estimated. We re-check status periodically because trials and prototypes evolve.