Haiden Deegan Steps Up: A 450 Class Preview
/ May 12, 2026 /
He’s been dominating on a 250 since he broke into the sport. Now he’s moved up to a bigger bike, a more competitive class, and is embracing the last name that helped make him famous.
At just 20 years old, Haiden Deegan will make his 450 Pro Motocross debut at Fox Raceway on May 30. He has won the 250 class twice in a row on the Star Racing Yamaha YZ250F, but he is about to tackle something new: the 450 is a different animal.
The jump from 250 to 450 in professional motocross is a complete reintroduction to the sport. The bikes are more powerful, with around 60 horsepower instead of 45. The braking zones are much tighter. The starts are violent. And you’re competing against riders who are more experienced, craftier, and unimpressed by youth. Seasoned riders like Cooper Webb, Chase Sexton, and Jett Lawrence have plenty of wins under their belt, and zero interest in making room for the new kid.
But Haiden Deegan has experience in earning his place.
His father, Brian Deegan, made quite a name for himself, founding Metal Mulisha in 1997 and winning X Games gold by crashing harder than almost anyone and still getting back up. He built a freestyle motocross empire while hanging out in garages. By the time Haiden was born in 2005, the Deegan name already held weight in action sports. It stood for loud, proud, unfiltered, American grit.
Haiden grew up in front of a camera, with the family YouTube channel documenting his passion for dirt bikes since he was four. Millions of subscribers watched his journey from pee-wee races in the backyard to earning amateur titles, and then signing a Star Racing contract at a young age. While most riders have to claw their way into visibility, Haiden had to overcome his fame to prove his credibility.
He won the 2024 and 2025 Pro Motocross 250 titles. He won the 2025 250 East Supercross title and just locked down the 2025 West Championship with several rounds to spare. He swept Loretta Lynn’s amateur competitions. His credibility has been proven over and over with wins at every level, for years. Haiden has shown everyone that the “YouTube kid” won’t fade from view now that the lap times have to be earned the hard way.
The bike for the 450 debut is the YZ450F. An incredible machine, it features an aluminum bilateral-beam frame, 450cc DOHC four-valve single motor, and power delivery that responds perfectly to Star Racing’s suspension work.
The question is how fast a 20-year-old who has only ever raced 250s can adapt to a bike that punishes indecision, and rewards riders who commit. It needs to be ridden by a racer who sits down and drives on corner exit instead of blipping the throttle. Deegan will also need to be up to the task physically, because races on a 450 take a toll on your body in a way the 250s do not.
Deegan has been practicing at this level for two years, incorporating training on 450s between his 250 class races to build strength. Most of his outdoor preparation since late last year has been on the bigger bike, and he’s worked up some notable speed on it.
In motorsports, each era is defined by a specific rider. The legacies of riders like Roger DeCoster, Bob Hannah, Jeremy McGrath, Ricky Carmichael, Ryan Dungey, Jett Lawrence, and others shaped what the sport looks like today.
Deegan is working hard to earn a spot for his name on that list. He has the pedigree, but more importantly, he has the results. He has a reliable, strong team. He has also been comfortable performing in front of cameras, and in his father’s shadow, since he was old enough to sit on a bike; he can handle the pressure.
The gate drops at Fox Raceway on May 30. Forty riders on 450s. One of them has been waiting his whole life for this.