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Buell Forum » Knowledge Vault (tech, parts, apparel, & accessories topics) » Chassis » Frame, Engine Mounts and Steering Head » Broken Motor Mount Bolt @ the Head- - Anyone else have the same problem? » Archive through June 25, 2001 « Previous Next »

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Court
Posted on Sunday, June 24, 2001 - 10:03 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Hein:

E-mail me your data

Name
Address
Year (bike, not you)
Model
VIN
Dealer
Dealer contact
Phone

Court
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Lars
Posted on Sunday, June 24, 2001 - 10:41 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

6/22 Court Sez: "Do NOT remove the bolt. Call your Buell dealer. They will (SHOULD)be able to take care of this. Court"

6/24 Court sez: "I have the diagrams, . . . Very fixable. Court"

Court, point of clarification for myself. You mean that it is "very fixable" by Manchester?

Arvel, I'll delete one of the straws from your order.

Mark in IRL and Hein, I'll have to look at that lug on the head when I get out of work tomorrow afternoon. I'm at work now so I can't check it out. I'm quite curious to see if it is fractured.

Hein: schweet bike! How does that song go? . . . if I were a rich man . . .

Oh, Arvel. Your order is ready. Sorry but we're out of non-fat milk and had to substitute whole instead. Hope your arteries don't clog up too bad.
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S2no1
Posted on Sunday, June 24, 2001 - 11:03 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Lars,

Not a problem. My "clog" level is already high so a little whole milk won't hurt any.

The head is aluminum so magparticle (magnaflux)won't work. The jugs are steel so mag will work there as wll as dye penetrant. The geometry is bad for eddy current. However, you can go down to the a good welding supply store, like Air Liquide, and buy some dye penetrant kits. Clean the are real well and mask off anything you don't want to be dyed. Spray on the dye. Wait 5 minutes. Clean with the cleaning solution (trichloethane or some equivalent so don't breathe or get on your skin) real good. Wait 10 minutes. If it's cracked bad the dye will bleed back out along the crack. Else spray the area with the developer. This dye penetrant should run you about 50 bucks or so.

Be careful with this technique since some aluminium and steel castings have surface porosities and give false readings. Unless it's a sharp line it may not be a crack, just false readings.

Thanks, for the Grande Latte, tastes great, even shared a sip with my wife. (Really, I have a cup of java in my hand now, I am terribly addicted to the stuff. JavaJoe in OKC will be glad to have me back as a client.)

Arvel
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Ralph
Posted on Monday, June 25, 2001 - 12:04 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Hein, they're fibbing about the dent in the oil filter. I've never seen or (more importantly) heard of that happening. The break at the head is non-typical. Normally (?) the type of problem Lars is having is what is seen (and that very rarely). I suppose the most probable explanation is either Mikej's or Aarons. I'll lean towards Aarons for now (sorry mikey). I can't tell you how much that pains me, I hate agreeing with an engineer. But there should be no contact in that area. I don't see how it can be an aliginment problem of that piece in itself. The single bolt holding the mount in place at the top would let it angle to meet the motor. I take it the dealers assesment of the straightness of the frame was done with an eyeball and a yard stick? To tell you the truth I wonder about the tie bars being replaced. From what I've been told adjusting them is somewhat mysterious and best left to experts. Experts I'm afraid that dwell only at the factory. That could certainly explain a build up stress and possibly the dented oil filter - simply, the motors in the wrong place in the frame. But, I'm shooting in the dark. Hopefully, now that a problem has come up your dealer will take a careful look and truely find the problem. By the way, I've said in the past you have a real one of a kind bike. It's super cool and it sounds like you really enjoy it. Don't let this get in the way, it's probably a problem that was caused by the accident but wasn't found. By the way, the rocker box is always very close to the front motor mount. Your finger nail measurement is normal.

Lars, yes. It should be very fixable by Manchester. I'm sure Court is taking care of you. I never asked, have you ever had any work done involving removing the head? Or, maybe, the rear isolators? Has this bike always been yours?

Arvel, I probably would have said "Dude, it's busted. Cool, huh-huh"
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Ralph
Posted on Monday, June 25, 2001 - 12:07 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Oh, uh, just in case you want to throw in the towel (want to give up) I'll take the swingarm :)

bighairyralph
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Lars
Posted on Monday, June 25, 2001 - 12:26 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

bighairyone,

Yes I've had the usual isolator incident. Bike's always been mine.

Lars
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Blake
Posted on Monday, June 25, 2001 - 12:52 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Hein: Is the stud (steel bolt) broken, or is the failure limited to the aluminum "boss" cast/machined into the head?

A casting (due to inherent defects/imperfectons) generally suffers about a 25% degradation of fatigue strength compared to the same alloy in a non-cast state. Aluminum alloys, especially those used for castings, generally exhibit very poor resistance to fatigue.

The fact that your mount did not fail immediately (it lasted 2000 Km), indicates that it most likely succumbed to a cyclically induced fatige failure. Careful expert inspection of the failure surface will reveal if the initial fracture was induced by excessive stress or a material defect. I would bet on a small initial fracture/crack initiated upon your impact incident. That crack then propagated until the area of intact material was insufficient to support the required loading. If this guess proves true, a new head should solve your problem for good.

I'd be real interested to see some closeups of both failure surfaces in their as-is condition.

And I agree vehemently with Aaron that there should be ZERO interference between the frame and front engine mount.

Blake (NOT an expert on this issue)
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Chuck
Posted on Monday, June 25, 2001 - 01:51 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Hein, are there other dealers nearby? Yours is full of s hi t! Your frame is likely bent, and I'll bet you a six-pack of Heineken your forks are bent as well. Handling may seem fine on the street; but it could be made better. Ever heard of an outfit called GMD COMPUTRACK ? They have a world wide network of franchises, and can repair your frame and forks to "better-than-new". . . but their services are not cheap. It may be less expensive to buy a new frame . . . though many top road racers "swear" by their geometry set-ups.
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Hans
Posted on Monday, June 25, 2001 - 01:56 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Hein, Tooo bad. The only thing I can say is that I saw a fracture like that (only the aluminum boss) on Charleys trashed bike. See the rebuilding history of an trashed X1 on his site. He laughed at me when I supposed it was irrepairable. Well: He DID repair it ...

Hans.
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S2no1
Posted on Monday, June 25, 2001 - 02:12 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

See I told you what an engineer would say. Blake did you graduate from MIT or some other equivalent?

However, that said, I think you had an initial crack based on the photographic information provided. It appears that the bottom of the boss has been cracked longer than the top. The crack geometry is also more jagged at the bottom and has worn spots in the finish indicating that these edges are moving over one another in a cyclic fashion.

This is from the archives:

Quote:

I think the frame is f.u.b.a.r. as the front mount is so badly bent, same goes for front fork and steering head. Ah well, everything is replaceable, I wanna keep this baby! Just hope the engine is undamaged, we'll see when it's transported to my great ....




From your ancedotal account shortly after the accident, one would theorize that the failure is related to the intial impact. However, one should also keep in mind that you had a bad head injury that impaired your observations to the point that you admittingly did not realize that the officer attending the accident site was a female.

In short, this is a great reason to put on some Nallin stage 3 flowed heads

Arvel
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S2no1
Posted on Monday, June 25, 2001 - 02:14 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

annotated photograph
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S2no1
Posted on Monday, June 25, 2001 - 02:16 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Shoot, I need to resize the photo. Oh well, just copy to your harddrive and open in Micro$oft Photo or XAT.

ARve.
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Peter
Posted on Monday, June 25, 2001 - 05:11 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Hein,
There is a simple solution to your problem. You need my '00 M2 so that you can ride this summer and get that evil cursed bike out of your (and your lovely wife's) life. I need your sick, bent and broken puppy because I'm a masochist, but unfortunately for me, your bike gives me a woody whenever I see it. We both know it's cursed, but I'll take it on and see if I can beat it. I also have the BMW to ride while I do it.
Mate, we need to talk a deal.
Seriously.
PPiA
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Hein
Posted on Monday, June 25, 2001 - 05:34 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Pete,
I hate you just as much as you hate me.
Hein
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Peter
Posted on Monday, June 25, 2001 - 05:35 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Just trying to help......
.....and I promise it won't be on the road again before next Croix, so you will have time to adjust and be happy again....
PPiA
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