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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: tsbt on May 28, 2012, 05:59:06 PM

Title: Fixing a busted piece of plastic
Post by: tsbt on May 28, 2012, 05:59:06 PM
I recently used crazy glue to fix the band of plastic on the bottom of my Integral Cases I'm guessing this'll hold for about one trip time will tell  :sip:

This got me thinking...is there a way to repair plastic, or is there a glue out there that will repair a broken tab or latch that anyone has found useful? I've got these busted tabs on my windscreen I need to repair (below) of course at some point I assume these Macgyver methods won't stand the test but figured I'd try and save the bucks with a little DIy in the meantime.
Title: Re: Fixing a busted piece of plastic
Post by: wmax351 on May 28, 2012, 06:13:08 PM
For ABS, ABS cement works well.

For others, I have used a plastic specified epoxy. Forgot the brand.
Title: Re: Fixing a busted piece of plastic
Post by: Chaos on May 28, 2012, 06:48:16 PM
I remember using some mix  of super glue and baking powder or soda or something for glueing small plastic bits on. Used it on a somewhat stressed tab and it worked quite well, was still there when I sold the bike.  Have to look up what it was.
Title: Re: Fixing a busted piece of plastic
Post by: Rick G on May 28, 2012, 07:52:50 PM
It aint cheap but I found it good http://www.plastex.net/index.php?pr=Home_Page (http://www.plastex.net/index.php?pr=Home_Page)
Title: Re: Fixing a busted piece of plastic
Post by: WayneDW on May 28, 2012, 09:00:52 PM
PlastiFix from Urethane Supply Co (google it).
Title: Re: Fixing a busted piece of plastic
Post by: wmax351 on May 28, 2012, 09:36:59 PM
Super glue and baking powder/soda works well.
Title: Re: Fixing a busted piece of plastic
Post by: tsbt on May 29, 2012, 03:55:36 PM
Thank you gents!  :yes
Title: Re: Fixing a busted piece of plastic
Post by: jeffhestand on May 30, 2012, 09:49:28 AM
i have had great results with Q Bond. It is a plastic powder that you set with a strong crazy glue. I get it at the local autobody shop but im sure you can find it. I have rebuilt cracked up saddlebags with it. Very Strong Stuff!!!
Title: Re: Fixing a busted piece of plastic
Post by: Pagman on May 30, 2012, 06:18:46 PM
JB Weld works better than glue because it's a cold weld. It's almost unbreakable stuff. This will be PERFECT for you Integral Cases . Also, I believe it will be strong enough to solidify your tabs back in place. I used JB Weld to glue relocated seat pan hardware on my 79 goldwing and the seat sits extremely firm in place. Also, I just recently glued my plastic spatula handle that broke in half and it's totally reusable and washable (why buy a new one?). I have no doubt it will work for your purposes. Just try to be neat with it because it can be a bit sloppy, especially if you're using it on a windshield.
Title: Re: Fixing a busted piece of plastic
Post by: sh00ter on May 30, 2012, 08:22:42 PM
JB Weld works better than glue because it's a cold weld. It's almost unbreakable stuff. This will be PERFECT for you Integral Cases . Also, I believe it will be strong enough to solidify your tabs back in place. I used JB Weld to glue relocated seat pan hardware on my 79 goldwing and the seat sits extremely firm in place. Also, I just recently glued my plastic spatula handle that broke in half and it's totally reusable and washable (why buy a new one?). I have no doubt it will work for your purposes. Just try to be neat with it because it can be a bit sloppy, especially if you're using it on a windshield.

Would this work on the tabs on the cover for the "trunk" area?  I recently broke the top tab off, only the two bottom ones remain...
Title: Re: Fixing a busted piece of plastic
Post by: Pagman on May 30, 2012, 09:06:01 PM

Would this work on the tabs on the cover for the "trunk" area?  I recently broke the top tab off, only the two bottom ones remain...

I don't know what the trunk looks like because my K is not equipped with any hard luggage. OR are you talking about the little storage space under the seat? Whatever the case is, JB weld is solid stuff and I'm sure it will secure your tabs. It's like 4 or 5 bucks at home depot. Just do a google search and read up on it.

It hardens within 24 hours so make sure you do a neat job because it will dry in the shape you leave it in. It's a gray color and is not sandable.
Title: Re: Fixing a busted piece of plastic
Post by: sh00ter on May 30, 2012, 09:24:30 PM

Would this work on the tabs on the cover for the "trunk" area?  I recently broke the top tab off, only the two bottom ones remain...

I don't know what the trunk looks like because my K is not equipped with any hard luggage. OR are you talking about the little storage space under the seat? Whatever the case is, JB weld is solid stuff and I'm sure it will secure your tabs. It's like 4 or 5 bucks at home depot. Just do a google search and read up on it.

It hardens within 24 hours so make sure you do a neat job because it will dry in the shape you leave it in. It's a gray color and is not sandable.

was talking about the under seat one.  thx for the tip.
Title: Re: Fixing a busted piece of plastic
Post by: dbikers on May 31, 2012, 10:42:41 PM
this may sound a bit cheesy, but have used this to repair plastic on my k-bike (right side cover and cracked up instrument base)
cheap and pretty sturdy.
(http://www.truevalue.com/assets/product_images/styles/large/432989.jpg)
Title: Fixing a busted piece of plastic
Post by: sch on May 31, 2012, 11:59:49 PM
I tried to fix my tail cowl cover with jb weld but didn't work. I'd love to know if you fix it/ how you fixed it.
Title: Re: Fixing a busted piece of plastic
Post by: tsbt on June 01, 2012, 12:43:29 PM
Upon inspection my slipstream deflector just has the nipples left, the fasteners that allow you to adjust it for wind, busted. Not sure how well any of these glues will do considering I would want to adjust this for riding, not much there for glue to hang on to :tongue attached a pic of all the areas that broke off when I dropped the bike and the whole mess started. Also haven't had much luck finding a used one, I've been looking for a couple of years for these particular pieces as they were already due for replacement before it spilled. Might splurge and just buy a new one.  :cowpoop:
Title: Re: Fixing a busted piece of plastic
Post by: johnny on June 01, 2012, 01:01:03 PM
the slipstream deflectors are still available oem...

i have 2 where the adjuster units are broken off at the nipple... jb weld has been successful... but will break again cause the surface space for bonding is tiny... and if you put a coat on the outside of the nipple it wont fit the faring hole...

j o
Title: Re: Fixing a busted piece of plastic
Post by: tsbt on June 01, 2012, 01:07:29 PM
the slipstream deflectors are still available oem...

i have 2 where the adjuster units are broken off at the nipple... jb weld has been successful... but will break again cause the surface space for bonding is tiny... and if you put a coat on the outside of the nipple it wont fit the faring hole...

Curses I tell you, curses!!!
Title: Re: Fixing a busted piece of plastic
Post by: Pagman on June 02, 2012, 10:33:17 AM
I just looked at the tabs on the "trunk" cover and those are so tiny. I think any glue you use wil fail in time because it's an area that keeps getting snapped. JB weld is tough enough to bond but then you're faced with keeping the tab precisely in place. It doesn't bond initially, so there is a chance it will move out of place during drying time. Also, you have to use a thick amount which might then make it difficult to close. It's a chance you're gonna have to take. Worse case scenario... who the hell needs that cover anyway?? LOL

If all attempts fail, try improvising before looking for a new one.  Velcro maybe? OR... just drill that sucker!
Title: Re: Fixing a busted piece of plastic
Post by: mystic red on June 02, 2012, 05:11:37 PM
Found this today.

Plast-Aid Acrylic And PVC Repair Kit - The Spa Depot (http://www.youtube.com/watch?v=isfX_uj0NyA#ws)

Have not tried it.........yet.
Title: Re: Fixing a busted piece of plastic
Post by: SmilingRide on November 16, 2016, 02:16:13 PM
BONDIC
I've been interested in trying this new plastic welder. If anyone has used it, I'd love to hear your application on your K bike.

Video:
https://www.youtube.com/watch?v=NV6xHe060WE

Order info:
https://www.thegrommet.com/bondic-liquid-plastic-welder-and-bonus-refill
Title: Re: Fixing a busted piece of plastic
Post by: The Mighty Gryphon on November 16, 2016, 05:02:43 PM
Here's my take on your slipstream deflector:  I don't know how tall you are, but I am 6'1" and to be quite honest, I cannot notice any difference whatsoever in air flow regardless of how the deflector is positioned.  If it was my bike I would seriously consider putting my money into something else.

You could just permanently attach the deflector by drilling a couple holes and screwing it to the windshield with a couple of spacers.  With a little thought you could do a pretty decent looking job of it.  No adjustability, but as far as that goes, see the first part of this post.
Title: Re: Fixing a busted piece of plastic
Post by: Motorhobo on November 17, 2016, 08:13:30 AM
BONDIC
I've been interested in trying this new plastic welder. If anyone has used it, I'd love to hear your application on your K bike.

Video:
https://www.youtube.com/watch?v=NV6xHe060WE

Order info:
https://www.thegrommet.com/bondic-liquid-plastic-welder-and-bonus-refill

I guess my question would be if you use it to join two parts, how does the activator light penetrate into the joint? Doesn't make sense to me. Might work as a filler. Lots of slams on Amazon...

https://www.amazon.com/Bondic-Anything-Waterproof-Resistant-Plastic/dp/B00QU5M4MG/ref=cm_cr_arp_d_product_top?ie=UTF8

I'll stick with JBWeld, 2-part epoxy, crazy glue and normal plastic cement.
Title: Re: Fixing a busted piece of plastic
Post by: zipster68 on November 17, 2016, 09:05:58 AM
Remove paint (sand). 
Tack weld with hot soldering iron. 
Fill with ABS cement.  If it's a 90 degree angle repair, I like reinforce the inside corner with some scrap ABS, and glue it all up.  Stronger than new!
Sand. 
Paint.