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The opening round of the 2025 FIM World Supercross Championship takes place this weekend in Argentina and arguably the biggest storyline is the 450 debut of multi-time 250 champion Haiden Deegan.
Deegan, who will race two rounds as a wildcard in the championship (round 1 this weekend and round 3 in Australia on Nov 29) recently inked a new multi-year deal with Monster Energy/Star Racing Yamaha which, for now, will have him racing the 250SX Class in Monster Energy Supercross before going 450 full-time in Pro Motocross.
So, why is Deegan racing the 450 in WSX? Daniel Blair and Kristen Beat had Deegan on the WSX preview show and here is what he had to say.
“Yeah, I feel like this was a good chance to get experience,” he said. “I mean, if I’m going to race 450 next year at outdoors, and I feel like it’s just time to get on the bike and get experience with that stuff. And definitely, I mean, in the future, the 450 supercross, if I could get a little head start, doing these races that don’t lead to an AMA championship, I feel like it’s something positive. And it was a good idea on my part.
“Yeah, I feel like in my career and as a person, I’ve always done well with having something to go after having pressure on my back. I feel like that’s where I really work the best. And yeah, this 450 opportunity is now a goal to chase and, yeah, 250 class, I feel like I got to a point where I was pretty dominant, where a lot of the races, they were coming, I wouldn’t say easy because it is a lot of hard work, but they were and we went and won a lot of championships. But that was a lot of hard work to get to that point where those where it became boring, as you said. And but now this 450 class is a whole new motivation to go start a new chapter and do good things.”
In the opening round, Deegan will face some stiff challenge in the form of Ken Roczen, Jason Anderson, Joey Savatgy, Justin Hill, Christian Craig, Justin Cooper and more. At the third round, the series will also welcome wildcards Eli Tomac and Cooper Webb. Deegan acknowledged it is going to be difficult.
“Yeah, I know, it’s going to be definitely a difficult chapter, you know, to hop into and I’m going to have to work hard towards it, but you’re going to be racing a whole bunch of 250 champions now that are now 450 vets. So, there’s a lot of good guys. I know a lot of people try to pit the Jett versus Haiden thing. And it’s like people need to understand there’s like ten good guys! It’s not it’s not me versus one person, it’s like, I gotta go out there and race some gnarly dudes on a dirt bike. And right now I have a ton of respect for those guys. And I want to go out there and obviously see where I fit in. And so far, well, we got a few guys in Argentina that are racing that and then some guys racing Australia round so I can kind of get a good gauge and I’m excited.”
Deegan will race these two rounds and return to the 250 Class in 2026, for now anyway.



I think that it is going to be a great race and I think that he may come out with a 4th or 5th on 1st race and build from there good luck 👍
Probably received $100K+ just to show up