With a custom-built motorcycle, British riders Allen Millyard and Henry Cole aim to smash their own 183.5 mph world record by breaching 200+ mph in May 2025.
At the heart of this record attempt is the Millyard Viper V10, a garage-built masterpiece with an 8-litre engine and 500 horsepower—more than double the power of a modern superbike.
Designed to carry two riders at over 200 mph, it’s a marvel of DIY engineering. Allen Millyard and Henry Cole’s recent practice run at 224 mph proves the bike’s potential, but the real test comes in May 2025.
In 2023, they clocked 183.5 mph on Millyard’s Viper V10, snatching the Guinness World Record from an American team.
For gearheads and speed junkies, this is a thrilling showcase of what’s possible when innovation meets raw power.
Daredevils Behind This Wild Ride?

British riders Allen Millyard and Henry Cole
Allen Millyard is the kind of guy I’d love to grab a drink with. He’s a genius bike builder who crafts insane custom machines in his garage—like V-twins, V12s, and now this record-breaking monster.
Henry Cole? He’s the TV star with petrol in his veins, always chasing the next big thrill. These two aren’t newbies; they’ve already smashed a two-up speed record at 183.5 mph back in 2023. Now, they’re gunning for more.
I’ve followed riders like Rossi and Márquez, but this duo’s grit and camaraderie remind me of why I fell in love with motorcycles in the first place.
What Powers the Viper V10?
Their ride is the Millyard Viper V10, and trust me, it’s a beast worth drooling over. Allen bolted an 8-litre Dodge sports car engine into this thing, pumping out 500 horsepower.
For context, that’s over twice the grunt of a modern superbike—think liter-class racers topping out around 200 bhp.
I’ve ridden some fast bikes in my time, but this? It’s like strapping a rocket to your back. During a practice run, they hit 224 mph, and the sound alone must’ve been deafening.
Why Is Two-Up Speed So Crazy?
Here’s where it gets nuts: they’re doing this with a passenger. I’ve taken a buddy on the back of my bike down a twisty backroad, and even at 80 mph, you feel every shift in weight.
Now crank that to 224 mph. The wind resistance must hit like a sledgehammer, and keeping that beast stable takes nerves of steel. One tiny lean the wrong way, and it’s game over. It’s not just skill—it’s trust.
Allen and Henry have to be in sync like a pit crew at a MotoGP stop.
Does This Rival Bonneville Legends?
For us American riders, speed isn’t just a number—it’s a legacy. The Bonneville Salt Flats are our holy ground, where icons like Rocky Robinson have carved their names.
Millyard and Cole might be Brits, but their quest vibes with that same spirit. I’ve dreamed of tearing across those flats myself, chasing my own high-speed glory. If these two pull this off, it could spark a wave of garage-built monsters stateside. Maybe I’ll dust off my tools and join the fray—who’s with me?
Are Speed Limits Meant to Be Broken?
May 2025 is when they go for the official record. The motorcycle world’s buzzing and I’m already counting the days.
For Allen and Henry, speed limits are just a dare waiting to be crushed. Hitting 224 mph on a bike they built from scratch? That’s the kind of crazy that fuels every rider’s soul.
If they can do it, what’s stopping us from pushing our boundaries? Let’s keep the throttle open and the dreams alive, one ride at a time.