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How rattly is too rattly?
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Saltcreek
Flying Brick Rider


Joined: 22 Oct 2008
Posts: 957
Location: New Hampshire

PostPosted: Fri Dec 12, 2008 11:14 am    Post subject: How rattly is too rattly? Reply with quote

I love everything about the K1100LT. The only flaw I find in an otherwise perfect machine is how much the upper fairing moves and rattles over bumps. Do they all do this? I haven't had it apart yet, waiting til I have to for some service.
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Off the grid
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PostPosted: Fri Dec 12, 2008 11:26 am    Post subject: Reply with quote

Check your main fairing bracket, mine was broken, got it welded and broke again. Does not really effect structural integrity but will cause the fairing to move more than usual.

The part alone is 280 plus massive labor to install it so it will have to wait for now.
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PostPosted: Fri Dec 12, 2008 12:37 pm    Post subject: Reply with quote

*Edit I personally do not think even with the broken bracket (and it's only the uppers that are severed, the bottoms are intact) the fairing does not move all that much....enough for me to notice but not all that much.
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Saltcreek
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Joined: 22 Oct 2008
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PostPosted: Fri Dec 12, 2008 1:04 pm    Post subject: Reply with quote

Off the grid wrote:

The part alone is 280 plus massive labor to install it so it will have to wait for now.


OTG, Max BMW which is near me lists it for $229. Still a lot. If you had to build a bike from scratch from that parts fiche it would cost $3,000,000.

How did you find yours was broken? Could you see by peering in around the instrument cluster or only on disassembly? Where did it break?
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Jim
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PostPosted: Fri Dec 12, 2008 2:07 pm    Post subject: Re: How rattly is too rattly? Reply with quote

Saltcreek wrote:
I love everything about the K1100LT. The only flaw I find in an otherwise perfect machine is how much the upper fairing moves and rattles over bumps. Do they all do this? I haven't had it apart yet, waiting til I have to for some service.


Yeah - check the brackets for breaks - but also check all the hardware that holds the fairing on. It's possible that some or all of the hardware is loose...
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RobWheatley
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Joined: 06 Jun 2008
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PostPosted: Fri Dec 12, 2008 6:39 pm    Post subject: Reply with quote

The fairing on my LT doesnt move or rattle at all even at 110+, they are a lot thicker than the fairings fitted to jap bikes so i think OTG is right, must be something broken.
Rob
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Off the grid
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PostPosted: Fri Dec 12, 2008 6:41 pm    Post subject: Reply with quote



#8....the rightmost bracket with the 4 holes is where it attaches to the headtube (where the steering bearings are) my snapped off the top 2 bolt tabs...the bottoms are still good.

And yes you can see them by turning the bars left and right, but use a flashlight.
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Scott_Anderson
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PostPosted: Fri Dec 12, 2008 7:36 pm    Post subject: Reply with quote

When I was first riding JO's SE home I thought it had a bad fairing rattle as well, but when I got home and really looked it over, it was just the front brake disks rattling in the keepers.

Both my LT's do it to, just not as loud.
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dubu650
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Joined: 30 Jan 2007
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PostPosted: Fri Dec 12, 2008 10:04 pm    Post subject: Reply with quote

Try this little test to determine if the source of the rattle is the disks or not.

Rattles were driving me nuts for a year until I discovered that if I applied slight pressure to my front brakes while riding over bumpy pavement, the rattles completely disappeared. Now that I know the origin, it doesn't bother me as much.

I checked out two other k bikes with floating rotors to see if mine were any looser than normal. All three rotors rattled equally. Very noticeable when backing out of the garage.

Steve
94 k1100rs
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Saltcreek
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Joined: 22 Oct 2008
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PostPosted: Sat Dec 13, 2008 5:24 pm    Post subject: Reply with quote

Thanks for all the ideas. I'll report back after inspection. We had an ice storm and have been tied up some with that. We're among the lucky ones who's power is back on. Some will be without for days.
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1994 K1100LT Mystic Red, bfd, 37000 miles, sold Sad
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rydor
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Location: Southern Illinois, U.S.A.

PostPosted: Sat Dec 13, 2008 7:42 pm    Post subject: Reply with quote

Tonight may be my last ride to work for a while... freezing rain coming in tomorrow, and I'll be in the same boat... Mad
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Saltcreek
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PostPosted: Sun Dec 14, 2008 1:48 pm    Post subject: Reply with quote

Off the grid wrote:
Check your main fairing bracket, mine was broken, got it welded and broke again. Does not really effect structural integrity but will cause the fairing to move more than usual.


Grid, (may I call you Grid?), sadly mine is broken in the same place as yours. I have questions:

Why do you think welding failed?
Before the weld failed, was fairing stability improved?
How much time did you drop on r & r ing the bracket?

I've always assumed if a part is partially impaired in one place, it places way more stress on the remaining points of attachment. Any opinions?

I now begin my search for a used bracket.
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1994 K1100LT Mystic Red, bfd, 37000 miles, sold Sad
2009 Wilderness Systems Zephyr 155 ST
2002 Litespeed titanium
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Off the grid
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Joined: 05 Jul 2006
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PostPosted: Sun Dec 14, 2008 2:28 pm    Post subject: Reply with quote

Quote:
Why do you think welding failed?

Not entirely sure, but I think it's an Achilles heel of our bikes. Important to note that I had it welded while it was still on the bike, perhaps you might have different results if you take it off and have it structurally reinforced.

Quote:
Before the weld failed, was fairing stability improved?

Yes.

Quote:
How much time did you drop on r & r ing the bracket?


Not sure what this means....but I have ridden almost a year with the welds broken to no ill effect other than a very slightly more rattly fairing. (noticeable only to me because I am a fanatic about my K and I know the bracket is broken)

Quote:
Grid, (may I call you Grid?),


Call me Dave.

Quote:
I now begin my search for a used bracket.

I did this as well, but 2 things to consider...used ones are very hard to come by and do you really want a used bracket that already has untold number of miles and stresses on that very point already?

If and when I replace it...I will go new.
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Saltcreek
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Joined: 22 Oct 2008
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PostPosted: Sun Dec 14, 2008 2:51 pm    Post subject: Reply with quote

Off the grid wrote:


Quote:
How much time did you drop on r & r ing the bracket?


Not sure what this means....but I have ridden almost a year with the welds broken to no ill effect other than a very slightly more rattly fairing. (noticeable only to me because I am a fanatic about my K and I know the bracket is broken)


Dave,

I assumed you had "removed and replaced" the bracket, having welded it on the bench or taken it to a welder. My question was how much time did you have in the job, not realizing you had it done in place. That's hard to imagine given where it is. I think a bracket welded by a pro might be stronger than a new one.

As an aside, since I've been reading your posts, I've wondered why you are "Off the Grid"?
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1994 K1100LT Mystic Red, bfd, 37000 miles, sold Sad
2009 Wilderness Systems Zephyr 155 ST
2002 Litespeed titanium
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Off the grid
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PostPosted: Sun Dec 14, 2008 2:56 pm    Post subject: Reply with quote

"Off the Grid" means literally unplugged from electricity, water, phone and the like....living completely disconnected from society.

For me it represents more of an ideal than a reality....perhaps not so much of an absolute but more of a longing to kick things waaaay down to a simpler time.

A time where relationships and your word meant more than a couple of percentage points on the bottom line.

/end hijack
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Saltcreek
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PostPosted: Sun Dec 14, 2008 3:07 pm    Post subject: Reply with quote

I wondered because I know several people here who are literally off the grid. Would love to be myself. We have solar hot water and make biodiesel. I assume /end hijack is an acknowledgment that we've strayed off topic? Thanks for your help on the bracket. I wonder how many of them are broken.
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1994 K1100LT Mystic Red, bfd, 37000 miles, sold Sad
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mike toon
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Joined: 16 May 2008
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PostPosted: Sun Dec 14, 2008 6:18 pm    Post subject: Reply with quote

When I test drove mine, I asked about that rattle. The seller said "what rattle". Still rattles over bumps even after tightening most and replacing several missing screws. I'll check that bracket when my broken leg heals in another month. (little dual sport spill in the desert)
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Saltcreek
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PostPosted: Sun Mar 22, 2009 7:53 am    Post subject: Reply with quote

Finally eased through 500' of relatively firm mud to get to the pavement yesterday to roll to the store for brussels spouts, first ride since the repaired fairing bracket. All the rattles are gone! What a difference. If your fairing rattles you really should check for this failure. I think catching it before it finished breaking may have avoided some nastiness.
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1994 K1100LT Mystic Red, bfd, 37000 miles, sold Sad
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Flying Duck
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PostPosted: Sun Mar 22, 2009 8:37 am    Post subject: Reply with quote

dubu650 wrote:
Try this little test to determine if the source of the rattle is the disks or not.

Rattles were driving me nuts for a year until I discovered that if I applied slight pressure to my front brakes while riding over bumpy pavement, the rattles completely disappeared. Now that I know the origin, it doesn't bother me as much.

I checked out two other k bikes with floating rotors to see if mine were any looser than normal. All three rotors rattled equally. Very noticeable when backing out of the garage.

Steve
94 k1100rs


Sounds like oyu need to replace the bobbins that hold the rotors onto the carriers. The rattle backing out of the garage is your first sign.
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hockeyshifter
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PostPosted: Sun Mar 22, 2009 9:59 am    Post subject: Reply with quote

for the riders that want to fix broken parts by welding it ..
keep this in mind if you weld.and the weld breaks it was not a good weld
if weld is done right it is stronger than the original.
also if you feel that the part is weak to begin with then you will
need to reinforce the part with additional metal (not weld) fore and aft
of the break


just my two cents worth
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