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Buell Forum » XBoard » Archive through February 18, 2017 » Front iso mounts L1501.02A8 « Previous Next »

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Archive through January 14, 2017Falloutnl30 01-14-17  07:40 pm
         

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Njloco
Posted on Sunday, January 15, 2017 - 10:19 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Just to let you guys know, linseed oil rejuvenates rubber, so this would be a maintenance application prior to the rubber going bad, the problem though, is that it might also effect the adhesion of the primer or glue that makes the rubber stick to the metal surfaces.
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Greg_e
Posted on Sunday, January 15, 2017 - 02:55 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I kept my old front and rear mounts hoping that someone can find a bushing to press in.
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Bykemike
Posted on Monday, January 16, 2017 - 07:48 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Lance,

Does this mean the front mounts are now available?
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651lance
Posted on Monday, January 16, 2017 - 08:08 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

No. Still hopping for the march release.
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Fast1075
Posted on Monday, January 16, 2017 - 01:14 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The problem is the bonded bushing is ideal for radial loads. Unfortunately, there is no radial load to speak of. The load is in extension. That is why they fail. Eventually.

Needs a re-think. Too bad it's not like a Blast!, where you can substitute a big twin isolator that is designed to work in extension.
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Greg_e
Posted on Sunday, January 22, 2017 - 01:24 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

What about a redesign... Think wishbone metal mount on the head, rubber conventional mount attached to the frame, simple bolt going through wishbone into rubber, and a nut of the far side. Space behind the steering is the only real obstacle. Well, and the single mounting point on the frame.
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Teeps
Posted on Sunday, January 22, 2017 - 03:17 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The XB front isolator is good as it needs to be, as designed.
I would be surprised if the design and execution can be improved; even at twice the price by other means.
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Teeps
Posted on Wednesday, February 01, 2017 - 11:01 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Twin Motorcycles makes it official(?) on fakebook today:
http://www.twinmotorcycles.nl/webshop/artikel.asp? mc=1&guid=YXHFSC&aid=11583&cid=5365&s=&a=&aname=Bu ell_XB912_TM_Engine_Mount_front_isloater

However, the business end of the mount, the isolator is still not shown.
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Cbig
Posted on Thursday, February 09, 2017 - 08:39 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I have one I will cut loose if anyone needs. Probably going to sell the bike. Probably. ..either way will cut it for a needy party.

Bigham.charles@gmail.com
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Hughlysses
Posted on Friday, February 10, 2017 - 08:35 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I'm not sure if this is the same part that Twin Motorcycles is selling or not. It showed up in a Buell group on Facebook this week. Apparently these are being made in Italy:


ISO


I agree that the OEM isolator is a good part; but if it becomes obsolete at some point it will be good to have an alternative source so these bikes can be kept on the road.

(Message edited by Hughlysses on February 10, 2017)
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Court
Posted on Friday, February 10, 2017 - 09:52 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

With a NEW manufacturer coming on board . . . I'd guess we are in great shape.

I'm really leary about these Unengineered" copy parts.

But . . . hey, that's just me and not everybody has a Buell engineer screaming in their ear.
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Reepicheep
Posted on Friday, February 10, 2017 - 10:34 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I'm all for somebody trying to make a rebuildable part for that isolator.

That doesn't look likely to be functionally equivalent to the original factory part. It doesn't seem like there is enough room for travel, and the original part was asymmetrical in terms of flex resistance.

Maybe the original maybe didn't travel that far, or perhaps the less material here is more durable, or perhaps it can be easily rebuilt every fourth oil change or something. I got a D in my last mechanical engineering class, and tucked my tail between my legs and went back to the EE department. Though in fairness, that was really probably part of an interdepartmental payback, because an EE prof clobbered a group of ME's the quarter before. But I digress.

I bet it's a pretty hairy thing to model, and an even trickier thing to design.
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Teeps
Posted on Friday, February 10, 2017 - 12:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Doesn't have to be a Buell engineer.
Anyone exposed to the engineering world would have concerns.

There is literally one bolt between you and a bad day on Buell XB.
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Greg_e
Posted on Friday, February 10, 2017 - 02:55 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Did they solve the shear issues with that design? Last thing I saw it wouldn't make a single oil change before shearing and metal on metal.
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Hughlysses
Posted on Friday, February 10, 2017 - 03:05 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Did they solve the shear issues with that design? Last thing I saw it wouldn't make a single oil change before shearing and metal on metal.

Unknown, but there are photos posted of a pile of these things ready to ship at $160 each plus shipping.

(Message edited by Hughlysses on February 10, 2017)
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Hughlysses
Posted on Friday, February 10, 2017 - 03:09 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)


isolators
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Hughlysses
Posted on Friday, February 10, 2017 - 03:39 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I'd surmise that it's fairly easy to design a front isolator that is (a) durable or (b) does a good job of isolating the engine's vibration. Designing and building one that does BOTH things is what's VERY difficult.

It'll be interesting to see how this design holds up. At least it'll be easy (and hopefully cheap) to change the rubber inserts if they get chewed up.
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Njloco
Posted on Saturday, February 18, 2017 - 10:31 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Does anyone know what the shear PSI range numbers are ? Also, any compression info would be good ?

Thanks
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Tpehak
Posted on Tuesday, July 27, 2021 - 10:49 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

OEM front isolator is not a good part, it is piece of shit. It lasts no more than 12000-15000 miles and costs $200

My 3rd front isolator I bought brand new freshly manufactured is disintegrated just withing a few years. Now I need to buy new front isolator.



(Message edited by TPEHAK on July 27, 2021)
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Teeps
Posted on Tuesday, July 27, 2021 - 11:11 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Sorry to hear about the poor service life of the front isolator on your bike.

When I sold my '06 XB12X it was 12 years in my care and had 42K miles.
The original isolator was still serviceable.

Not sure why they don't last on your bike.
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Tpehak
Posted on Tuesday, July 27, 2021 - 12:53 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

They performed not enough tests with this part to check longetivity or maybe they knew it and accepted this kind of crap. It might last longer on motorcycles with softer suspension with longer travel, but on 2009 Buell XB 12 Scg the front suspension is stiff and short and stresses the front isolator too much. They need to revisit the front isolator design, maybe enrage the rubber part or change the part geometry.
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34nineteen
Posted on Tuesday, July 27, 2021 - 04:51 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

You seemed to be onto something with the testing you were doing with your mount. I know it wasnt working out, but it seemed like you were very close. You may want to modify your CNC-ed bracket to try to fit a common bushing. I thought I saw something somewhere about a VW Transporter bushing being used. If anyone has the skills and facilities to beat this, you do.
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