Sexton’s crash

Herr Lich
Posts
2568
Joined
7/11/2023
Location
Sydney, NSW, AU
8/10/2025 2:19pm
RonSkj wrote:

The best explanation is.. The bike was banged up!

The front wheel had Epstein-Barr...

5
5
philG
Posts
11224
Joined
5/12/2012
Location
GB
8/10/2025 2:45pm
Zycki11 wrote:
It isn't from a bent rotor. The piston seized on the front brake due to mud packing and heat.  It has happened to so many local...

It isn't from a bent rotor. The piston seized on the front brake due to mud packing and heat.  It has happened to so many local people it isn't funny, also why they run disc guards to help prevent. In this case, it could have been helped by his earlier tip over, but more than likely just packing of mud and the deep mulched soil with debris.  

My thoughts... dirt in the lever from the tip over, brake heats up as a result, at some point its going to stop... or am internal blockage on the return bleed in the master cylinder... Had both happen, not often, but often enough. 

2
2
FreshTopEnd
Posts
13361
Joined
8/16/2006
Location
Sacramento, CA, USA
8/10/2025 2:52pm
Press516 wrote:
No, the front wheel locked on the takeoff of the jump.  He unexpectedly lost gyro effect and caused the crash.It seems like he had to have...

No, the front wheel locked on the takeoff of the jump.  He unexpectedly lost gyro effect and caused the crash.

It seems like he had to have picked up a rock in the rotor at just the worst time…. I hope the team reports what happened, but don’t expect them to.

Tiki wrote:
He was front end high. While I agree with most of what you said, the front wheel being stopped should have brought that front end down...

He was front end high. While I agree with most of what you said, the front wheel being stopped should have brought that front end down. That has always happened in my experience when the front end stops. 

Pretty sure it's exactly the opposite, that's why they rear wheel brake tap to bring the rear up.  Stop the front with the rear under power off the jump  and the rear drops. 

1
4

The Shop

yamahaha131
Posts
739
Joined
4/7/2010
Location
Newark, OH, USA
8/10/2025 3:16pm

I understand why he played dumb, but I.H. is full of shit in his response. 

13
1
sandtrack315
Posts
2859
Joined
7/19/2013
Location
Philadelphia, PA, USA
8/10/2025 3:22pm

Unlikely that Chase boner airs like that with the front wheel locked up and it’s not a bike issue. It locked on the face, and he gave it gas to try to compensate, but just gave it too much and once the wheel left the take off, he looped out. 

4
3
Money
Posts
1939
Joined
1/18/2011
Location
Fresno, CA, USA
8/10/2025 3:35pm

This crash adds to the one he had during the week before Ironman. Wonder if we see him back before charlotte 

2
AZ35
Posts
2986
Joined
6/1/2008
Location
Peoria, AZ, USA
Fantasy
8/10/2025 3:41pm

I don't know but Chase has some really weird crashes.

^^^ This is the most accurate explanation. Really odd how he keeps having such freak things happen. 

5
1
VRR7
Posts
868
Joined
6/1/2011
Location
ZA
8/10/2025 3:55pm

It was an electrical issue,

Apparently according to KTM is was not the bikes fault it was the tracks fault - It happens a lot to KTM's on that jump. 

5
VRR7
Posts
868
Joined
6/1/2011
Location
ZA
8/10/2025 4:03pm
1
8/10/2025 4:13pm

I was standing right between the finishe line and that wall jump yesterday as it happened. I was keeping eye on him catching the leaders and I saw him launch it and start to come off the back of it. I ran down to the announcer tower with about 20 others and watched him try to get back on the bike. It was wide open. When it landed the throttle was jammed and the front brake was locked. You can see in the video he tried to ride it and it wouldn’t go anywhere. I watched him walk up the hill past us. He had a killer stare. Didn’t say a word, didn’t look at anyone just straight ahead stare. You could tell he was fuming. Later on I heard a few mechanics talking and saying “did you see sextons front brake lock up and his bike was stuck wide open” 

19
1
mx617
Posts
1641
Joined
4/1/2008
Location
Kamloops, BC, CA
8/10/2025 4:23pm

He's just lucky he didn't break a leg on that landing. 

29
Tiki
Posts
10677
Joined
8/1/2006
Location
Corona, CA, USA
Fantasy
8/10/2025 4:42pm Edited Date/Time 8/10/2025 4:52pm
Tiki wrote:
He was front end high. While I agree with most of what you said, the front wheel being stopped should have brought that front end down...

He was front end high. While I agree with most of what you said, the front wheel being stopped should have brought that front end down. That has always happened in my experience when the front end stops. 

Every time I’ve ever seen someone hit the front brake in the air they usually never get sent back down, like a normal brake tap. Usually...

Every time I’ve ever seen someone hit the front brake in the air they usually never get sent back down, like a normal brake tap. Usually throws dudes to the side or up, like you saw with chase 

The times i have done it, the front end came down in a hurry. Note, the wheel was turning then stopped so the inertia came downward. Perhaps Chase left the ground with it stopped so there was no inertia. 

I was screwing around with it one day. Just a tip, don't do this. Its not healthy. Complete Goon. 

Edit: don't do it while wheeling either. If you were curious. 

4
3
kennyc
Posts
197
Joined
5/9/2012
Location
Liberty Hill, TX, USA
Fantasy
8/10/2025 4:52pm
I was standing right between the finishe line and that wall jump yesterday as it happened. I was keeping eye on him catching the leaders and...

I was standing right between the finishe line and that wall jump yesterday as it happened. I was keeping eye on him catching the leaders and I saw him launch it and start to come off the back of it. I ran down to the announcer tower with about 20 others and watched him try to get back on the bike. It was wide open. When it landed the throttle was jammed and the front brake was locked. You can see in the video he tried to ride it and it wouldn’t go anywhere. I watched him walk up the hill past us. He had a killer stare. Didn’t say a word, didn’t look at anyone just straight ahead stare. You could tell he was fuming. Later on I heard a few mechanics talking and saying “did you see sextons front brake lock up and his bike was stuck wide open” 

How did they end up getting the bike off the track?  Jake Dungey or the whole team?

3
1
aeffertz
Posts
12806
Joined
7/16/2015
Location
La Crosse, WI, USA
8/10/2025 5:06pm

Something a lot of people aren’t recognizing is that the front brake can be dragging where it will still roll on the ground but once in the air there’s not enough resistance so it will stop spinning, so it didn’t have to be locked up on the face for this to happen. It could have been rolling and then stopped in the air because the brake was still dragging which is why he was immediately off balance. When he was rolling around afterwards you could see it wasn’t locked up but still somewhat engaged and would grab randomly. 

26
8/10/2025 5:07pm
I was standing right between the finishe line and that wall jump yesterday as it happened. I was keeping eye on him catching the leaders and...

I was standing right between the finishe line and that wall jump yesterday as it happened. I was keeping eye on him catching the leaders and I saw him launch it and start to come off the back of it. I ran down to the announcer tower with about 20 others and watched him try to get back on the bike. It was wide open. When it landed the throttle was jammed and the front brake was locked. You can see in the video he tried to ride it and it wouldn’t go anywhere. I watched him walk up the hill past us. He had a killer stare. Didn’t say a word, didn’t look at anyone just straight ahead stare. You could tell he was fuming. Later on I heard a few mechanics talking and saying “did you see sextons front brake lock up and his bike was stuck wide open” 

kennyc wrote:

How did they end up getting the bike off the track?  Jake Dungey or the whole team?

After Chase walked by me I watched another couple of laps and went to the other side of the track to get my bike from the Legends & Heroes display and go to the Star Yamaha tent. I didn’t see his bike come off the track 

1
Pop Shmoke
Posts
2226
Joined
6/17/2020
Location
Boston, MA, USA
8/10/2025 5:28pm
8
yamahaha131
Posts
739
Joined
4/7/2010
Location
Newark, OH, USA
8/10/2025 6:47pm

It was an electrical issue,

VRR7 wrote:

Apparently according to KTM is was not the bikes fault it was the tracks fault - It happens a lot to KTM's on that jump. 

I love how Ian Harrison couldn't tell you anything about what happened and hadn't talked to Chase but he could 100% confirm it was not a mechanic issue "or anything like that" lol. 


Was probably electrical. 

18
2
dr00andrew
Posts
75
Joined
4/7/2022
Location
Point Pleasant, NJ, USA
8/10/2025 7:14pm
-MAVERICK- wrote:
Ian Harrison, Red Bull KTM Factory Racing Team Manager: "Our day started well with Tom finishing third after taking Washougal off, and in Moto 2, he...

Ian Harrison, Red Bull KTM Factory Racing Team Manager: "Our day started well with Tom finishing third after taking Washougal off, and in Moto 2, he rode really well to stay in contact with the leaders for the first eight laps, and third overall was a nice comeback for him. Julien didn't have a great day, but he did get through the day, and he was definitely stronger than when he left off, so hopefully he can build on this. Chase rode an incredible first moto that was nice to watch as a fan – just amazing – and he managed to ride a very calculated race to take the win. Second race, he lost control over the jump – I did not see it exactly – but afterwards I could see that he couldn't get going as the front brake was jammed on. It was unclear at that time when it'd happened, but judging from when we got to the bike, it looks to be that the brake packed full of mud, and that was the after-effect of the crash. Leading up to the crash, we're still unclear of exactly what happened, but it does look like we could be dealing with debris in the brakes from the track, and if thats the case, we need to come up with a solution on how to prevent this in the future."

Zycki11 wrote:
This makes perfect sense. Mud packs inthe caliper and piston overheats the brake until it seizes end wualah another crazy Sexton moment. Happy he is healthy...

This makes perfect sense. Mud packs inthe caliper and piston overheats the brake until it seizes end wualah another crazy Sexton moment. Happy he is healthy, and he was riding well. 

The bike has a rotor guard too, just really unfortunate it happens to only him.  Everyone else was riding the same track

3
8/10/2025 7:19pm
Unlikely that Chase boner airs like that with the front wheel locked up and it’s not a bike issue. It locked on the face, and he...

Unlikely that Chase boner airs like that with the front wheel locked up and it’s not a bike issue. It locked on the face, and he gave it gas to try to compensate, but just gave it too much and once the wheel left the take off, he looped out. 

I don't know what video you were watching, his front wheel was rotating as he left the jump...

image 1962.png?VersionId=uiq 2

it stopped rotating at the same time his rear wheel stopped rotating, you can see his foot on the rear brake lever...

image 1945.png?VersionId=S

His rear wheel started rotating as soon as he released the rear brake...

image 1951.png?VersionId=6g1mMIfSGLt3F5c ptyy

Bike's sideways, his legs are splayed, he is out of control...

image 1957.png?VersionId=mimage 1958

Lands rear wheel first, with left foot on foot peg, right foot on ground, ass on seat...

image 1959

Front wheel rotates when he lands...

image 1961.png?VersionId=huSqxWjcJZyHps591mbPgxv..pDXwcimage 1960

Rookie error!

2
41
yak651
Posts
9074
Joined
8/26/2006
Location
Appleton, WI, USA
Fantasy
8/10/2025 7:23pm
aeffertz wrote:
The KTM group has had a lot of brake issues this year... Sexton and Barcia in SX, Beaumer and Sexton outdoors. Didn't Ryder D lose his...

The KTM group has had a lot of brake issues this year... Sexton and Barcia in SX, Beaumer and Sexton outdoors. Didn't Ryder D lose his brake too at GH stopwatch nationals and that's what caused him to go flying over the berm into the fence?

What caused his Pala crash? Seemed awfully strange also

2
Metisse
Posts
132
Joined
10/5/2020
Location
Saint Louis, MO, USA
8/10/2025 9:19pm
Pretty sure it's exactly the opposite, that's why they rear wheel brake tap to bring the rear up.  Stop the front with the rear under power...

Pretty sure it's exactly the opposite, that's why they rear wheel brake tap to bring the rear up.  Stop the front with the rear under power off the jump  and the rear drops. 

Hitting the rear brake produces a torque that twists the swingarm/frame forward, so the front of the frame twists downward; the rear wheel stays in (essentially) the same position, the front wheel drops.

Hitting the front brake produces a torque that twists the forks forward, and in turn the rear of the frame upward; the front wheel stays in (essentially) the same position, the rear wheel rises.

By chance, did you draw force diagrams in high school or college physics? Remember the concept of, "for every force, there exists an equal and opposite force?"  If not, Google force diagrams, and try drawing one for each situation, with the bike in the air, and not leaning to the right or left; for extra credit, draw a force/torque diagram for locking both brakes, and another while the bike is tilted in the air!

18
2
CPR
Posts
7233
Joined
10/4/2018
Location
AU
8/11/2025 1:11am
Mm471 wrote:
He went the same if not further than the lap before, doesn’t happen with a front brake lock up on the face

He went the same if not further than the lap before, doesn’t happen with a front brake lock up on the faceIMG 5091 1IMG 5092 2

Heads up riding from Hunter; he switched up his line to avoid hitting Sexton as he left the jump face.

6
Homey55
Posts
1306
Joined
2/18/2010
Location
collinsville, OK, USA
8/11/2025 6:33am

Okay, sounds like the throttle stuck wide open before the jump (possible front brake, too), probably grabbed whatever brake he could, dead sailored because he had no gyro from either wheel, landed, and trashed the bike further.

What I want to know if if AMA will fine him for not providing an interview 🤣

2
7
snillum
Posts
438
Joined
7/25/2017
Location
Greer, SC, USA
Fantasy
8/11/2025 6:45am

Regardless of what happened, I don't understand how he even thought about getting back on the bike after what I would have assumed was a broken ankle, broken wrists, and obliterated jewels...

8
2
FreshTopEnd
Posts
13361
Joined
8/16/2006
Location
Sacramento, CA, USA
8/11/2025 8:38am Edited Date/Time 8/11/2025 8:57am
Pretty sure it's exactly the opposite, that's why they rear wheel brake tap to bring the rear up.  Stop the front with the rear under power...

Pretty sure it's exactly the opposite, that's why they rear wheel brake tap to bring the rear up.  Stop the front with the rear under power off the jump  and the rear drops. 

Metisse wrote:
Hitting the rear brake produces a torque that twists the swingarm/frame forward, so the front of the frame twists downward; the rear wheel stays in (essentially)...

Hitting the rear brake produces a torque that twists the swingarm/frame forward, so the front of the frame twists downward; the rear wheel stays in (essentially) the same position, the front wheel drops.

Hitting the front brake produces a torque that twists the forks forward, and in turn the rear of the frame upward; the front wheel stays in (essentially) the same position, the rear wheel rises.

By chance, did you draw force diagrams in high school or college physics? Remember the concept of, "for every force, there exists an equal and opposite force?"  If not, Google force diagrams, and try drawing one for each situation, with the bike in the air, and not leaning to the right or left; for extra credit, draw a force/torque diagram for locking both brakes, and another while the bike is tilted in the air!

So, what you're saying is that the inertia of the spinning wheel has less influence over distance than the momentary force of the wheel stopping?  Isolated from any influence of the rear wheel, spinning or stopped?

We have the new seat bounce. . . 😂

[BTW, real questions, not bashing, just trying to understand the logic - the math behind the physics is out of my league)

3
1
Not hillbilly
Posts
1382
Joined
6/8/2024
Location
Gaithersburg, MD, USA
8/11/2025 8:45am

His wheel was locked up in the air…

Why didn’t he nose dive ?

 

Because a stopped wheel RISES in the air over a jump. It’s common practice to tap the rear brake to bring the rear of the bike up while in the air. Adding throttle and spinning the wheel makes it go down.

1
3
8/11/2025 9:20am Edited Date/Time 8/11/2025 9:25am
Press516 wrote:
No, the front wheel locked on the takeoff of the jump.  He unexpectedly lost gyro effect and caused the crash.It seems like he had to have...

No, the front wheel locked on the takeoff of the jump.  He unexpectedly lost gyro effect and caused the crash.

It seems like he had to have picked up a rock in the rotor at just the worst time…. I hope the team reports what happened, but don’t expect them to.

Tiki wrote:
He was front end high. While I agree with most of what you said, the front wheel being stopped should have brought that front end down...

He was front end high. While I agree with most of what you said, the front wheel being stopped should have brought that front end down. That has always happened in my experience when the front end stops. 

That's if you stop the rotation in the air, if it's stopped previous, there's no transfer of energy to bring the front end down.

Also, if Chase had hit the brake after the pothole, once the front wheel is stopped, it does not have to be "locked up"

there's just nothing to start it rotating again. So either way not enough info to actually know.

6
Shred
Posts
1582
Joined
10/21/2021
Location
Brighton, CO, USA
Fantasy
8/11/2025 9:53am Edited Date/Time 8/11/2025 10:02am

In the first photo in the chain above, you can clearly see Chase’s right hand full on the grip under the brake lever, and no finger over the brake lever….so idiotic ideas HE stopped the front wheel at that high speed jump is stupid…not that I need a picture to know that.  Chase didn’t make a “rookie” error.  No rookie pro would make that error.  Hell, I would never make that error.  Nobody with any time on a bike would make that error.  Anyone suggesting otherwise either hates Chase, or has zero seat time.  If you don’t ride then don’t make riding opinions like you know anything.  It was a mechanical of some sort.  Bike, bent rotor, rock, mud…something like that.  Amazing that between the shock absorbing some of the impact and hitting the ground that he was not injured….as far as we know.


btw…you can’t tell the front wheel is turning from the angle in that blury first frame.  Just that it is too blurry to see knobbies.  Watching the replay you can never see rotation.

13
8

Post a reply to: Sexton’s crash

The Latest