2020 Yamaha YZ 450 F frame cracked

rryker
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rryker
Edited Date/Time 6/24/2021 5:28pm
2020 Yamaha YZ 450 F frame cracked
Have any of you seen a frame crack here before?
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JBecker 72
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JBecker 72 6/21/2021 4:56pm
6/21/2021 4:56pm
Dang, that sucks man.
rryker
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rryker 6/21/2021 4:59pm
6/21/2021 4:59pm
50 hours
Yeti831
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Yeti831 6/21/2021 5:00pm
6/21/2021 5:00pm
I’ve only seen it on the neck welds. That’s not a good sign.

What did you do? Those spars aren’t exactly weak.
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rryker
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rryker 6/21/2021 5:09pm
6/21/2021 5:09pm
Not sure how it happened? Son came in from riding, wash the bike and noticed it.
RMT
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RMT 6/21/2021 6:34pm
6/21/2021 6:34pm
Take a picture a little farther away.
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Nairb#70
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Nairb#70 6/21/2021 7:51pm
6/21/2021 7:51pm
rryker wrote:
Not sure how it happened? Son came in from riding, wash the bike and noticed it.
Migbt want to give that whole frame the hairy eyeball.
1
SmokinJoe439 6/21/2021 8:58pm
6/21/2021 8:58pm
It looks dented inward like it landed on something hard like a rock.
7
Myke
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Myke 6/21/2021 9:58pm
6/21/2021 9:58pm
Let's see picture of whole bike.
4
rryker
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rryker 6/22/2021 10:07am
6/22/2021 10:07am
Here is picture of entire bike, not sure why though


2
rryker
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rryker 6/22/2021 10:29am
6/22/2021 10:29am
FYI, the front end of the bike is off because we are putting the x-trig triple clamp on his new bike along with his valved suspension. Racing Red Bud.
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Racer16
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Racer16 6/22/2021 10:30am
6/22/2021 10:30am
rryker wrote:
FYI, the front end of the bike is off because we are putting the x-trig triple clamp on his new bike along with his valved suspension...
FYI, the front end of the bike is off because we are putting the x-trig triple clamp on his new bike along with his valved suspension. Racing Red Bud.
Might not wanna race it now😬
3
GD350
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GD350 6/22/2021 10:40am
6/22/2021 10:40am
That's terrible! Hope they get you sorted and glad everyone's ok. Maybe it's just all the weight and how wide it is
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fourfourone
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fourfourone 6/22/2021 10:45am
6/22/2021 10:45am
GD350 wrote:
That's terrible! Hope they get you sorted and glad everyone's ok. Maybe it's just all the weight and how wide it is
no lol
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skeef
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skeef 6/22/2021 11:18am
6/22/2021 11:18am
Yeah, not sure i'd run that frame at redbud. Although my dad would put a bandaid on it and say ride pu$$y.
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Dimblewambie
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Dimblewambie 6/22/2021 11:22am
6/22/2021 11:22am
Sounds like they pulled the parts off that bike to put on a freshie for red bud.
4
rryker
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rryker 6/22/2021 11:40am
6/22/2021 11:40am
Dimblewambie wrote:
Sounds like they pulled the parts off that bike to put on a freshie for red bud.
Correct, new bike has 1 hour on it
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gt80rider
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gt80rider 6/22/2021 11:55am
6/22/2021 11:55am
rryker wrote:
FYI, the front end of the bike is off because we are putting the x-trig triple clamp on his new bike along with his valved suspension...
FYI, the front end of the bike is off because we are putting the x-trig triple clamp on his new bike along with his valved suspension. Racing Red Bud.
Not on that bike .... lol

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rryker
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rryker 6/22/2021 2:10pm
6/22/2021 2:10pm
New bike ready for RedBud
21
WhatsStoppingU 6/23/2021 7:41pm
6/23/2021 7:41pm
rryker wrote:
Here is picture of entire bike, not sure why though [img]https://p.vitalmx.com/photos/forums/2021/06/22/498964/s1200_964648B2_1CA9_4084_89EF_DC201B6C2F5A.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2021/06/22/498963/s1200_34AF2BB6_B3A8_44DD_B567_E5C73BF85877.jpg[/img]
Here is picture of entire bike, not sure why though


Heat may have caused that crack. I see evidence of re-welding on the frame spar and that subframe doesn’t look right. Heat discoloration and grinding/sanding around some of the welds and someone left a large piece of wire hanging on one of the welds. We’ve all seen some ugly factory welds on aluminum frames from all OEM’s but these are extra ugly and I’ve never seen original welds with wire still hanging on…
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WhatsStoppingU 6/23/2021 7:58pm
6/23/2021 7:58pm
Makes me want to see the welds closer to that crack.
JBecker 72
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JBecker 72 6/24/2021 12:57pm
6/24/2021 12:57pm
So, I just looked up a new frame. $1687 at RMATVMC. That’s better than I would have guessed considering what mountain bike frames cost.
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sandhills
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sandhills 6/24/2021 3:52pm
6/24/2021 3:52pm
JBecker 72 wrote:
So, I just looked up a new frame. $1687 at RMATVMC. That’s better than I would have guessed considering what mountain bike frames cost.
For some reason I never thought of checking for OEM frames, I thought that was like the one part you can't replace since it has the VIN on it.

Turns out yeah, like $1100 for my old bike and they're still making them, CHP will transfer the VIN.

I was getting stressed lately about how much money I've been putting into a bike with some frame rust and this makes me feel much better.
Hammer 663s
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Hammer 663s 6/24/2021 5:05pm
6/24/2021 5:05pm
rryker wrote:
Here is picture of entire bike, not sure why though [img]https://p.vitalmx.com/photos/forums/2021/06/22/498964/s1200_964648B2_1CA9_4084_89EF_DC201B6C2F5A.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2021/06/22/498963/s1200_34AF2BB6_B3A8_44DD_B567_E5C73BF85877.jpg[/img]
Here is picture of entire bike, not sure why though


Well it’s clear from that shot that he’s squeezing the bike so hard with his knees that he cracked the frame. He must never skip leg day, eh? Wink
2
Bearuno
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Bearuno 6/24/2021 5:28pm
6/24/2021 5:28pm
I'd like to see more pictures of the frame now that it's naked, if the OP could do so.

As well as the original outside picture, a look at the inside of the spar, and, the same 2 views for the LH spar would be interesting. Underneath the spar near the crack point would be useful, too.

I might go to the local Yam dealer to have a squizz at the Spars profile.

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