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Nightrider1
Senior Member
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Posted: Wed Aug 27th, 2008 10:10 am | 1st Post |
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Another TIP Wingers.
If you have any broken or cracked Bumpers, Saddlebags, Trunk, or Faring, and it is made out of plastics, use the glue ladies use for putting on their false fingernails. Betcha didn't know this one did ya? A Southern Poorboy's Repair. (Me)
NightRider1
Last edited on Wed Aug 27th, 2008 10:11 am by Nightrider1
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Nightrider1
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WingMan71
Member
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Posted: Wed Aug 27th, 2008 02:18 pm | 2nd Post |
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All,
Plastic welding is the way to go.
Most motorcycle thermoplastic body panels are made of ABS (acrylonitrile butadiene styrene) plastic, as opposed to PVC (polyvinyl chloride) plastic. In plumbing, ABS pipes are the black pipes and PVC pipes are the white ones.
The only sure way to repair thermoplastics is to weld them. Plastic welding is a real art and is similar to metal welding in that a tool is used to heat the substrate and then a rod of new material is fed into and fused to the existing surfaces. Plastic welding kits (heat gun and ABS rods) are available from various online sources.
An easier way to “weld” plastic is to do it the way plumbers do, using pipe dope. If you want to permanently repair your ABS plastic body panels go to Home Depot or another hardware store and buy some ABS pipe dope (glue). (Don’t try PVC pipe glue, it will not work on ABS plastic!) Applying the ABS glue to your cracked body panels actually melts some of the surrounding ABS plastic on the body panel and fuses it back together in a near permanent weld. (Yeah, if you drop a brick on it you make break it again, but hey.)
I read up on plastic welding at length before fixing the trunk on my ’87 Aspencade, which was severely cracked on the bottom where it bolted to the support frame. I was absolutely amazed at the results. The repaired area is really strong, with no hint of flexing or trying to re-crack at the same spot. Works great.
I lucked out and did not have to repaint since the ABS pipe dope is black and so is my bike. (I believe that the welding kits can be obtained with different color ABS rods.)
Hope this helps someone else out with their ABS plastic repair.Last edited on Wed Aug 27th, 2008 02:34 pm by WingMan71
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Matt G
Very Active Member
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Posted: Wed Aug 27th, 2008 03:00 pm | 3rd Post |
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| A better fix is to use the ABS cement and fiberglass cloth.
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Nightrider1
Senior Member
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Posted: Thu Aug 28th, 2008 03:56 pm | 4th Post |
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Wing,
Thats a new one for me. I will have to check it out.
Thanks,
NightRider1
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Nightrider1
"I am a Summer Person. I hate Winter""
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Rick S
Very Active Member
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Posted: Thu Aug 28th, 2008 05:06 pm | 5th Post |
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Matt G wrote: A better fix is to use the ABS cement and fiberglass cloth.
Not sure how this would be better than welding it?
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MDKramer
Moderator
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Posted: Thu Aug 28th, 2008 06:39 pm | 6th Post |
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Rick S wrote: Not sure how this would be better than welding it?
The fiberglass spreads any stress that may have caused the crack to begin with out over a larger area of the plastic.
Mike
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Liverpool
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Posted: Thu Aug 28th, 2008 07:00 pm | 7th Post |
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I was going to fiberglass my trunk and side cover on my 82 and after reading this I used fiberglass cloth with ABS cement and IT WORKS GREAT!!! I did the side cover yesterday and it's solid as a rock. A little (well a lot) of sanding and you can't even see the crack from the outside and inside the fiberglass cloth makes a strong looking patch. Thanks, I can't believe how great this site is!!!
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Armo
Active Member
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Posted: Thu Aug 28th, 2008 07:06 pm | 8th Post |
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| I always use JBL cold weld compound,
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sdfrank
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Posted: Thu Aug 28th, 2008 08:56 pm | 9th Post |
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| That's good stuff!
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