Kawasaki Concours Forum

The C-14, aka Kawasaki Concours-14, the new one :) => The Bike - C14/GTR 1400 => Topic started by: VirginiaJim on December 07, 2015, 02:08:41 PM

Title: Strange cracks...
Post by: VirginiaJim on December 07, 2015, 02:08:41 PM
This is reposted from the UK forum...

http://www.gtr1400.co.uk/forums/index.php?topic=5184.0 (http://www.gtr1400.co.uk/forums/index.php?topic=5184.0)

Anyone with a 10 on up see this yet?
Title: Re: Strange cracks...
Post by: B.D.F. on December 07, 2015, 02:23:25 PM
No, have not seen that one before- clearly a KiPass failure.

Looks like the screw may have been over- tightened.

Brian

This is reposted from the UK forum...

http://www.gtr1400.co.uk/forums/index.php?topic=5184.0 (http://www.gtr1400.co.uk/forums/index.php?topic=5184.0)

Anyone with a 10 on up see this yet?
Title: Re: Strange cracks...
Post by: RBX QB on December 07, 2015, 02:50:50 PM
http://www.zggtr.org/index.php?topic=18029.msg220697#msg220697 (http://www.zggtr.org/index.php?topic=18029.msg220697#msg220697)

Similar, but different. This one looks like a screw problem, suppose mine could have been, too (where the grip heather switch mounts).
Title: Re: Strange cracks...
Post by: B.D.F. on December 07, 2015, 03:13:03 PM
You might want to add an Easy Boys! after the 'screw problem' part of that second sentence.

:-)

Brian

http://www.zggtr.org/index.php?topic=18029.msg220697#msg220697 (http://www.zggtr.org/index.php?topic=18029.msg220697#msg220697)

Similar, but different. This one looks like a screw problem, suppose mine could have been, too (where the grip heather switch mounts).
Title: Re: Strange cracks...
Post by: jimmymac on December 07, 2015, 03:50:25 PM
One of my panels failed right where the well nut is located. Just looks like a missing screw. Mainly because it is a missing screw. ::)
I must have used it too much when it was new... :P

Probably from landing a monster wheelie. 8)
Title: Re: Strange cracks...
Post by: Sgt Mac on December 07, 2015, 03:55:50 PM
No, have not seen that one before- clearly a KiPass failure.

Looks like the screw may have been over- tightened.

Brian

 :goodpost:  Probably didn't realize it at the time and the vibrations/time/environmental conditions compounded the issue.
Title: Re: Strange cracks...
Post by: maxtog on December 07, 2015, 04:22:51 PM
Looks like the screw may have been over- tightened

I agree.  I bet that sucker was just a little too tight and over time, it finally stressed the plastic too much and with a hard bump, game over.  Sorry to see that kind of thing happen, it is a pain.
Title: Re: Strange cracks...
Post by: VirginiaJim on December 07, 2015, 04:35:58 PM
Doesn't happen on the 08/09 bikes.
Title: Re: Strange cracks...
Post by: RBX QB on December 07, 2015, 05:14:12 PM
You might want to add an Easy Boys! after the 'screw problem' part of that second sentence.

:-)

Brian

Ha! I thought about it, but didn't want to be accused of plagiarizing your lines.
Title: Re: Strange cracks...
Post by: sailor_chic on December 07, 2015, 05:19:41 PM
I was relieved seeing the first picture here and it was a bike part. I feared this was going to be some Walmart type pics of diverse people showing there backsides.
Title: Re: Strange cracks...
Post by: C14lvr on December 07, 2015, 05:28:43 PM
VirginiaJim,
My 2011 has done that. Stinks.
Title: Re: Strange cracks...
Post by: maxtog on December 07, 2015, 05:31:40 PM
VirginiaJim,
My 2011 has done that. Stinks.

It really is VERY easy to overtighten many of the bodywork screws on the C14.  They like to use those rubber bushings below the screws.  The bushings are nice because they can help to eliminate rattles and keep things from loosening.  But they also crank up the force on the plastic and make it difficult when tightening to know when to stop.  And I doubt there are specs for the torque for body screws :)  (Nor have I seen a torque-metered screwdriver... and who would do that, anyway???)
Title: Re: Strange cracks...
Post by: C14lvr on December 07, 2015, 05:44:06 PM
It really is VERY easy to overtighten many of the bodywork screws on the C14.  They like to use those rubber bushings below the screws.  The bushings are nice because they can help to eliminate rattles and keep things from loosening.  But they also crank up the force on the plastic and make it difficult when tightening to know when to stop.  And I doubt there are specs for the torque for body screws :)  (Nor have I seen a torque-metered screwdriver... and who would do that, anyway???)

I know, Max...
I've had to pull that panel a few times for various things like when I installed my Rostra, or when I change my air filter, etc.

Didn't think I overtightened it enough to cause that, but... It did.
If I had left it any looser, it probably would have vibrated out.
You wouldn't think using a 3" 3/8's extension with a torx bit by hand would have overtightened it enough to crack it, but mine split completely into.

It didn't break though when I tightened it. It waited for many miles later. Looked down one day... there it was... cracked in two at the bolt.
Title: Re: Strange cracks...
Post by: PH14 on December 07, 2015, 06:38:17 PM
No, have not seen that one before- clearly a KiPass failure.

Looks like the screw may have been over- tightened.

Brian

Look exactly like that. Someone hamfisted it.
Title: Re: Strange cracks...
Post by: maxtog on July 01, 2018, 09:36:51 AM
It really is VERY easy to overtighten many of the bodywork screws on the C14.  They like to use those rubber bushings below the screws.  The bushings are nice because they can help to eliminate rattles and keep things from loosening.  But they also crank up the force on the plastic and make it difficult when tightening to know when to stop.

Well, now mine is cracked too (below glovebox trim near the heater control).  And it has been months since I last removed that panel and pretty sure I didn't over-tighten.  It just "appeared" after several hot days.  For now, it is just a single crack, and doesn't connect to the screw (it is on the other side, near the handlebars).  Makes me sick, but, oh well.  Next time I take it out for some reason, I will look and see if there is a way to mend it from behind with epoxy or something :(
Title: Re: Strange cracks...
Post by: jwh20 on July 01, 2018, 10:35:07 AM
A new one is only about $65.  So before spending a lot of money with plastic welding services or making something out of epoxy, you might just want to order a new one.  It does, however, appear to me that this piece is under-engineered.  The way it cracks looks like the stress of the openings and the inserts is just too much for that thickness and grade of plastic.
Title: Re: Strange cracks...
Post by: maxtog on July 01, 2018, 12:26:39 PM
A new one is only about $65.  So before spending a lot of money with plastic welding services or making something out of epoxy, you might just want to order a new one.  It does, however, appear to me that this piece is under-engineered.  The way it cracks looks like the stress of the openings and the inserts is just too much for that thickness and grade of plastic.

Yeah, it always seemed to me to be "too thin", from the first time I disassembled it.  I thought "surely this is going to break, especially over time when it is bound to get more brittle".  Interestingly, I found the part on one major site- it is the only one of all those shown in the explosion diagram that is "not available".  $7 for some epoxy might do the trick.  It isn't structural and I don't think it is like to get worse, and I am in no rush to fix it.  Might be quite a while before I take that panel off for some other purpose.
Title: Re: Strange cracks...
Post by: Conrad on July 02, 2018, 07:02:42 AM
You might want to add an Easy Boys! after the 'screw problem' part of that second sentence.

:-)

Brian

Screw problems in a thread titled 'Strange Cracks'. Yeah, we're gonna need a few 'easy boys' here and there.
Title: Re: Strange cracks...
Post by: PH14 on July 02, 2018, 10:47:12 AM
Screw problems in a thread titled 'Strange Cracks'. Yeah, we're gonna need a few 'easy boys' here and there.

 :banana
Title: Re: Strange cracks...
Post by: VirginiaJim on July 02, 2018, 10:54:24 AM
Word of the day is incorrigible.
Title: Re: Strange cracks...
Post by: Conniesaki on July 02, 2018, 01:29:33 PM
"Strange cracks" ... this is what many males seek, especially in younger years.
Title: Re: Strange cracks...
Post by: B.D.F. on July 02, 2018, 01:32:06 PM
Incorrigible: a state of being meaning one is able to be encouraged.

Brian

Word of the day is incorrigible.
Title: Re: Strange cracks...
Post by: Gigantor on July 06, 2018, 01:10:53 PM
To much torque
Title: Re: Strange cracks...
Post by: maxtog on July 14, 2018, 10:02:56 AM
Well, now mine is cracked too (below glovebox trim near the heater control).

Finally have a photo of it.  I pressed on the right side a bit to help let it show.
Title: Re: Strange cracks...
Post by: Rubber_Snake on July 14, 2018, 10:16:24 AM
At least the split is so straight, it almost looks like a seam. 

An easy way to repair/limit more damage:

On the underside, use fiber tape and E6000 glue.  Rough up the plastic with sandpaper for bite.  I used this method on my R2D2 scooter’s front fender and it worked well.  The E6000 glue is flexible, but strong enough to keep it together. 

The attached pic is the fibertape before adding the glue.  Yours would be on a much smaller scale, of course.  That whole fender was split pretty badly, but is holding up nicely. 

You could always try some sort of epoxy, as well.
Title: Re: Strange cracks...
Post by: maxtog on July 14, 2018, 12:24:22 PM
At least the split is so straight, it almost looks like a seam. 

An easy way to repair/limit more damage:

On the underside, use fiber tape and E6000 glue.  Rough up the plastic with sandpaper for bite.  I used this method on my R2D2 scooter’s front fender and it worked well.  The E6000 glue is flexible, but strong enough to keep it together. 

The attached pic is the fibertape before adding the glue.  Yours would be on a much smaller scale, of course.  That whole fender was split pretty badly, but is holding up nicely. 

You could always try some sort of epoxy, as well.

That is exactly my plan.  My amazon order came in, I have JB Weld plastic epoxy, black.  I planned on using some fiberglass mesh tape and the epoxy, after roughing the underside.  Have no idea when next that panel will come off, but when it does, I should be ready.
Title: Re: Strange cracks...
Post by: maxtog on May 06, 2023, 10:36:49 PM
Many photos lost when forum was reloaded.

Here are two I found.  First is the crack, second is showing the repair I made from the bottom, using fiberglass mesh and JB Weld.
Title: Re: Strange cracks...
Post by: J.R. on May 07, 2023, 11:41:43 PM
Many photos lost when forum was reloaded.

Here are two I found.  First is the crack, second is showing the repair I made from the bottom, using fiberglass mesh and JB Weld.

Crap. I had no idea this was common thing. I noticed cracks in the exact same spot just this week. I attributed it to spilling a little bit of brake fluid when I bled the clutch and missing some wheb i cleaned it. Fixed mine with some expoy and hoping it lasts.