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Plastic Welding (usury's Project Karma)

Posted: Tue Jun 25, 2019 10:56 am
by usury
Bad smells but great results with the ~$16 (USD) Harbor Freight "Plastic Welding" kit

It's more like an 80W soldering iron with a thick triangular tip, but it gets the job done...
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The portion of the rear cover (above the tail light) where the screw fastens it to the bike was missing. I had imagined buidling it up with fiberglass or epoxy, but I wanted to try the inexpensive plastic welder before I got into all that.
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It worked great - here is during and after (with some Bondo)...
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So I tackled the crack in the rear plastic...
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And the broken (but crudely reattached with JB Weld) front tab on the rear plastic. This was actually the first piece that I did. I figured start small and inconspicious. I should have taken the time to remove all the paint from the area. The paint does burn off, but it makes a much yuckier and crustier repair...
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Worked really well on the cracked and splintered rear fender/under seat plastics...
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Take care to not burn yourself. Use in a well ventilated area. Take your time. Like any welding, take care to control the amount of heat in your work piece.