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 crack in the weld on the swing arm

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vnp514
malibu_dan
craigq
SheWolf
Jäger
0007onWR
Hertz
motokid
trav72
drater
14 posters
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drater

drater



crack in the weld on the swing arm Empty
PostSubject: crack in the weld on the swing arm   crack in the weld on the swing arm EmptyTue Apr 12, 2011 11:16 am

fond a crack on the weld of the swing arm by the chain slider. taking it in to see what the prognoses is, if i have to get a whole new swing arm or it can be welded.

anyone have this happened?
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trav72

trav72



crack in the weld on the swing arm Empty
PostSubject: Re: crack in the weld on the swing arm   crack in the weld on the swing arm EmptyTue Apr 12, 2011 11:25 am

That's the first I've heard on the WRR's. However, I've seen a few break on KTM's and BMW's.

If it's just a small crack, I don't see any reason why a good welder couldn't fix it. However, I would be thinking about it every time I got on the bike and would probably replace it. If for peace of mind only.
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motokid
Moderator
motokid



crack in the weld on the swing arm Empty
PostSubject: Re: crack in the weld on the swing arm   crack in the weld on the swing arm EmptyTue Apr 12, 2011 11:26 am

Got any pictures?


_________________
2008 WR250X
Gearing: 13t - 48t
Power Commander 5 / PC-V
Airbox Door Removed - Flapper glued - AIS removed
FmF Q4
Bridgestone Battlax BT-003rs
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trav72

trav72



crack in the weld on the swing arm Empty
PostSubject: Re: crack in the weld on the swing arm   crack in the weld on the swing arm EmptyTue Apr 12, 2011 11:31 am

motokid wrote:
Got any pictures?


Yes! I would like to see pics also.
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drater

drater



crack in the weld on the swing arm Empty
PostSubject: Re: crack in the weld on the swing arm   crack in the weld on the swing arm EmptyTue Apr 12, 2011 3:50 pm


took it in to the shop and they are going to give yamaha a call and ask so questions? we will see because the bike is three years old and over 27,000 miles on it, hard miles. so thats a factor, and i have my capt. that is a whiz at welding, so again we will see?

i do think about it and i dont want think about when im riding, so of course a brand new one would be i deal.

they are $553.51.


cant bring up my pics?? dont know what it is???
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trav72

trav72



crack in the weld on the swing arm Empty
PostSubject: Re: crack in the weld on the swing arm   crack in the weld on the swing arm EmptyTue Apr 12, 2011 4:09 pm

FYI - There is a guy parting out a brand new X on ebay right now. He wants under $300 for the swing arm. Unfortunately it's black. But if Yamaha doesn't cover it you have a cheaper option. I bought a master cylinder from the same seller (bike) and it was brand new. Anyway, another possible option for you.

http://cgi.ebay.com/ebaymotors/WR250X-WR250-X-SWINGARM-REAR-SWING-ARM-WR-250X-WR-250-/110666105027?pt=Motorcycles_Parts_Accessories&hash=item19c436c0c3#ht_6441wt_939

WRinSC likes this post

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Hertz

Hertz



crack in the weld on the swing arm Empty
PostSubject: Re: crack in the weld on the swing arm   crack in the weld on the swing arm EmptyTue Apr 12, 2011 4:31 pm

It could be welded if they don't replace it. However, you should seriously consider who does the work. If they do a shitty job, chances are it will end up being weaker than before the fix or distorted so much that you wont be able to use it anyway.

I would really like to see some pictures. Depending on the location and severity, that one on eBay may be close to the price of a repair done by a reputable shop.
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0007onWR

0007onWR



crack in the weld on the swing arm Empty
PostSubject: Re: crack in the weld on the swing arm   crack in the weld on the swing arm EmptyTue Apr 12, 2011 11:51 pm

Careful with welding a cracked weld, you have to remove the crack with a deep V or it will come back
A freind and outstanding welder did my quad racer swing arm many years ago and every crack came back not long after
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drater

drater



crack in the weld on the swing arm Empty
PostSubject: Re: crack in the weld on the swing arm   crack in the weld on the swing arm EmptyWed Apr 13, 2011 6:28 pm

thanks trav72 on that swing arm. sent pictures to yamaha, waiting to her back? a new one is the way to go, those always crack again, if not in the same spot, next to it.

why cant i post my pictures scratch
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motokid
Moderator
motokid



crack in the weld on the swing arm Empty
PostSubject: Re: crack in the weld on the swing arm   crack in the weld on the swing arm EmptyWed Apr 13, 2011 6:30 pm

drater wrote:
thanks trav72 on that swing arm. sent pictures to yamaha, waiting to her back? a new one is the way to go, those always crack again, if not in the same spot, next to it.

why cant i post my pictures scratch

Are you using imageshack or photobucket?

Or are you trying to upload from your hard drive?

_________________
2008 WR250X
Gearing: 13t - 48t
Power Commander 5 / PC-V
Airbox Door Removed - Flapper glued - AIS removed
FmF Q4
Bridgestone Battlax BT-003rs
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Jäger
Admin
Jäger



crack in the weld on the swing arm Empty
PostSubject: Re: crack in the weld on the swing arm   crack in the weld on the swing arm EmptyWed Apr 13, 2011 6:32 pm

drater wrote:
why cant i post my pictures scratch
Use the tools here - all them little icons you see above the window you're typing in.

To post your pictures, observe 4th group of icons from the left hand side. The first icon, if you mouse over it, will pop up a text box saying "host an image". Click it and follow the instructions. No Smugmug, Flickr, etc account needed.
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motokid
Moderator
motokid



crack in the weld on the swing arm Empty
PostSubject: Re: crack in the weld on the swing arm   crack in the weld on the swing arm EmptyWed Apr 13, 2011 6:35 pm

posting pictures <-- or click this

_________________
2008 WR250X
Gearing: 13t - 48t
Power Commander 5 / PC-V
Airbox Door Removed - Flapper glued - AIS removed
FmF Q4
Bridgestone Battlax BT-003rs
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drater

drater



crack in the weld on the swing arm Empty
PostSubject: Re: crack in the weld on the swing arm   crack in the weld on the swing arm EmptyWed Apr 13, 2011 6:51 pm

[img]crack in the weld on the swing arm P4120008

/img]crack in the weld on the swing arm P4120014

there it is! i was able post pics all the time and something changed in my settings i guess?


Last edited by drater on Wed Apr 13, 2011 8:37 pm; edited 1 time in total
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drater

drater



crack in the weld on the swing arm Empty
PostSubject: Re: crack in the weld on the swing arm   crack in the weld on the swing arm EmptyWed Apr 13, 2011 6:56 pm

just looked at that swing arm for sale, i wonder if they are all the same dimension as WRR 08?
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SheWolf
Alpha Rider
SheWolf



crack in the weld on the swing arm Empty
PostSubject: Re: crack in the weld on the swing arm   crack in the weld on the swing arm EmptyWed Apr 13, 2011 7:30 pm

0007onWR wrote:
Careful with welding a cracked weld, you have to remove the crack with a deep V or it will come back
A freind and outstanding welder did my quad racer swing arm many years ago and every crack came back not long after

I remember that quad!! You, Bruce and Darryl had the same damned one. Confusing. GAHHHH I saw the crack and now the thing is a forbidden pic.... eeek Damn Drater quit posting porn. poser2

_________________
A wolf's voice echoed down the mountain 'Share the bounty of the hunt with your brothers and sisters, and forever be strong and free.' crack in the weld on the swing arm Wolf_b10
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Hertz

Hertz



crack in the weld on the swing arm Empty
PostSubject: Re: crack in the weld on the swing arm   crack in the weld on the swing arm EmptyWed Apr 13, 2011 7:51 pm

Try hosting it directly on this forum.
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motokid
Moderator
motokid



crack in the weld on the swing arm Empty
PostSubject: Re: crack in the weld on the swing arm   crack in the weld on the swing arm EmptyWed Apr 13, 2011 7:55 pm

How exactly is a cracked swingarm picture a violation of imageshack?????

eeek

_________________
2008 WR250X
Gearing: 13t - 48t
Power Commander 5 / PC-V
Airbox Door Removed - Flapper glued - AIS removed
FmF Q4
Bridgestone Battlax BT-003rs
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trav72

trav72



crack in the weld on the swing arm Empty
PostSubject: Re: crack in the weld on the swing arm   crack in the weld on the swing arm EmptyWed Apr 13, 2011 8:03 pm

drater wrote:
just looked at that swing arm for sale, i wonder if they are all the same dimension as WRR 08?

Yes they are all the same. That one in particular already comes with all of the bearings as well. Brand new I might add.

BTW - I have absolutely no affiliation with that seller.
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Hertz

Hertz



crack in the weld on the swing arm Empty
PostSubject: Re: crack in the weld on the swing arm   crack in the weld on the swing arm EmptyWed Apr 13, 2011 8:11 pm

Yes the only difference between that swing arm and your WRR's is the color.
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drater

drater



crack in the weld on the swing arm Empty
PostSubject: Re: crack in the weld on the swing arm   crack in the weld on the swing arm EmptyWed Apr 13, 2011 8:40 pm

crack in the weld on the swing arm P4120015

ok lets see if that one stays on there!

ya i think i might be on that swing arm? thanks for that info, black is good, i'll take it rather then paying 550.00
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craigq

craigq



crack in the weld on the swing arm Empty
PostSubject: Re: crack in the weld on the swing arm   crack in the weld on the swing arm EmptyWed Apr 13, 2011 8:59 pm

Noob question, how exactly does a swingarm crack like that ? After looking at the WR's and comparing it to the one on my old CBR125R it seems pretty beefy...
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Hertz

Hertz



crack in the weld on the swing arm Empty
PostSubject: Re: crack in the weld on the swing arm   crack in the weld on the swing arm EmptyWed Apr 13, 2011 9:07 pm

That looks fairly severe. That hole in the crater at the end of the weld pictured is a textbook breeding ground for crack initiation but does not appear to be part of your problem. I'd like to see where it goes up top and down below to maybe get an idea of how it started. Once you get it off, if you remember take a few more photos.
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drater

drater



crack in the weld on the swing arm Empty
PostSubject: Re: crack in the weld on the swing arm   crack in the weld on the swing arm EmptyWed Apr 13, 2011 9:12 pm

ya it stops right there under the chain slider about a 16th of a inch in from the picture.

i know so many guys that have ten year old bikes that they beat and can't even crack them, and this cracks?
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trav72

trav72



crack in the weld on the swing arm Empty
PostSubject: Re: crack in the weld on the swing arm   crack in the weld on the swing arm EmptyWed Apr 13, 2011 9:22 pm

Wow! That does look severe! I wouldn't ride with that even if it was welded again. I jump mine all of the time, ride lots of whoops and ST every weekend. There are no cracks anywhere that I can see (I went and looked after seeing your pic). Maybe it was a defective weld? scratch
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Hertz

Hertz



crack in the weld on the swing arm Empty
PostSubject: Re: crack in the weld on the swing arm   crack in the weld on the swing arm EmptyWed Apr 13, 2011 9:22 pm

craigq wrote:
Noob question, how exactly does a swingarm crack like that ? After looking at the WR's and comparing it to the one on my old CBR125R it seems pretty beefy...

Most of the time cracks start because of a discontinuity or stress riser inside or on the surface of the material. Internal discontinuities are usually unwanted junk or voids that get there during the manufacturing process. That hole at the end of the weld in the picture drater posted is a classic example of a surface discontinuity, something the welder should have avoided. Others include undercut at the edges of a weld, contamination in a weld, and even excessive weld. The stresses the part sees as a whole are multiplied at these points which can lead to a crack if the stress gets high enough or it sees enough fatigue cycles.
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crack in the weld on the swing arm Empty
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