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Old 04-02-2013, 10:58 AM   #1
cbig OP
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Plastic welding/glue

Need help welding or gluing the plastic headlight holder on my xr400. Cracked it good, seems to be the same stuff as the fenders. Any recommendations?
Weld, glue, what to use and where to get?

Thanks,

Cbig
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Old 04-02-2013, 11:01 AM   #2
mcma111
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I might/should have a XR400 head light shroud. I'll have to look.
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Old 04-02-2013, 11:02 AM   #3
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Quote:
Originally Posted by cbig View Post
Need help welding or gluing the plastic headlight holder on my xr400. Cracked it good, seems to be the same stuff as the fenders. Any recommendations?
Weld, glue, what to use and where to get?

Thanks,

Cbig
Wally world/auto stores sell plastic epoxy. They come in a 2 part tube and you mix them together. I've used a few different brands and they all work well.
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Old 04-02-2013, 11:14 AM   #4
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Steve

Quote:
Originally Posted by mcma111 View Post
I might/should have a XR400 head light shroud. I'll have to look.

Thanks but that won't work. The dual sport kit is Electrolux which is gone. I cracked their light kit and need to glue or weld it. No replacement for this.

Thanks,

Chuck
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Old 04-02-2013, 11:45 AM   #5
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I've plastic welded many motorcycle plastics. Best and most reliable fix out there. Takes some practice to get the technique and requires sanding, filler, and paint to look like new.
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Old 04-02-2013, 12:05 PM   #6
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How is this done?

Quote:
Originally Posted by TinkerinWstuff View Post
I've plastic welded many motorcycle plastics. Best and most reliable fix out there. Takes some practice to get the technique and requires sanding, filler, and paint to look like new.
Special tools or something like a tip on a soldering iron? How do I know I have the right "rod?"


thanks
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Old 04-02-2013, 12:45 PM   #7
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If there's any sort of real surface area, superglue works great on plastic, but it doesn't sound like that's the case.

Otherwise, epoxy. Man, that stuff is amazing. Bit of a smelly mess, and make sure you get it in the right temperature (too cold and it won't cure right), but if you follow the directions, you'll end up with a bomb-proof material that looks like melted plexiglass and sticks to anything. Rough up the plastic with some sandpaper first, and it'll be like new.
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Old 04-03-2013, 07:02 AM   #8
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Any thermoplastic is best fixed by plastic welding it with the same kind of material and a soldering iron at the right temperature and a suitable tip.

Figure out what material that is (look for markings on the part, then search the internet for explanations of the code), and then either find another piece of plastic like it or order pieces of rod online.
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Old 04-03-2013, 07:13 AM   #9
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If you are in a bind and are not afraid of it looking a bit messy, use crazy glue and baking soda.
If possible, make the sides of the crack as much of a V as possible, fill with crazy glue and sprinkle baking soda on top of the wet crazy glue.

You will get an amazingly strong bond.

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Old 04-03-2013, 07:22 AM   #10
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http://www.urethanesupply.com/

Great source for plastic welding info and supply. Their Plasti-Fix is kind of a universal. Scroll down to documents section and you can download a handbook. He also publishes a book that is very useful also.
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Old 04-03-2013, 07:37 AM   #11
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Quote:
Originally Posted by LukasM View Post
Any thermoplastic is best fixed by plastic welding it with the same kind of material and a soldering iron at the right temperature and a suitable tip.

Figure out what material that is (look for markings on the part, then search the internet for explanations of the code), and then either find another piece of plastic like it or order pieces of rod online.
Lukas nailed it on the head. I have welded a fairing with material from the stock hand guards I removed. I good welding tip and like material is the best way. I have also used a 2 part epoxy Marine Tek but welding with same material is the best.
Good luck, I think you will be surprised how well that works! Afterwards just sand and buff it, viola!
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Old 04-03-2013, 09:25 AM   #12
cbig OP
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Thanks for the tips

Harbor freight has a kit I will check out. Wish I could just use a soldering iron or torch but I see how it needs to be mixed in. One piece is black and thin, the other actual fairing type piece holding headlight is as thick as a fender.
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