| Author |
Message |
    
Njloco
| | Posted on Sunday, January 15, 2017 - 10:19 am: | 
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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. |
Greg_e
| | Posted on Sunday, January 15, 2017 - 02:55 pm: |
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I kept my old front and rear mounts hoping that someone can find a bushing to press in. |
Bykemike
| | Posted on Monday, January 16, 2017 - 07:48 am: |
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Lance,
Does this mean the front mounts are now available? |
651lance
| | Posted on Monday, January 16, 2017 - 08:08 am: |
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No. Still hopping for the march release. |
Fast1075
| | Posted on Monday, January 16, 2017 - 01:14 pm: |
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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. |
Greg_e
| | Posted on Sunday, January 22, 2017 - 01:24 pm: |
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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. |
Teeps
| | Posted on Sunday, January 22, 2017 - 03:17 pm: |
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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. |
Teeps
| | Posted on Wednesday, February 01, 2017 - 11:01 am: |
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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. |
Cbig
| | Posted on Thursday, February 09, 2017 - 08:39 pm: |
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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 |
Hughlysses
| | Posted on Friday, February 10, 2017 - 08:35 am: |
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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:
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) |
Court
| | Posted on Friday, February 10, 2017 - 09:52 am: |
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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. |
Reepicheep
| | Posted on Friday, February 10, 2017 - 10:34 am: |
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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. |
Teeps
| | Posted on Friday, February 10, 2017 - 12:40 pm: |
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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. |
Greg_e
| | Posted on Friday, February 10, 2017 - 02:55 pm: |
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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. |
Hughlysses
| | Posted on Friday, February 10, 2017 - 03:05 pm: |
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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) |
Hughlysses
| | Posted on Friday, February 10, 2017 - 03:09 pm: |
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Hughlysses
| | Posted on Friday, February 10, 2017 - 03:39 pm: |
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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. |
Njloco
| | Posted on Saturday, February 18, 2017 - 10:31 am: |
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Does anyone know what the shear PSI range numbers are ? Also, any compression info would be good ?
Thanks |
Tpehak
| | Posted on Tuesday, July 27, 2021 - 10:49 am: |
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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) |
Teeps
| | Posted on Tuesday, July 27, 2021 - 11:11 am: |
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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. |
Tpehak
| | Posted on Tuesday, July 27, 2021 - 12:53 pm: |
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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. |
34nineteen
| | Posted on Tuesday, July 27, 2021 - 04:51 pm: |
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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. |
