"Welding" Plastic?

[MyCarVsYourHe...]

I've had some success in the past when "welding" small cracks in plastic fairings on bikes, I just wanted to know what techniques you lot use, I'm a minimalist so I just glue the broken pieces together, heat up a flat round butter knife and run it along the back side of the split which usually holds quit well.

[Aff]

I use a gas soldering iron with a knife tip, i make perpendicular cuts along the length of the crack/join to tack it. Then i make a cut down the length of the crack/join and then fill this by melting a bit of plastic over it filling the cut, this has worked pretty well for me and i haven't had a repair break yet.

On the outside i use the same technique and just sand it down and paint if afterwards.
____________________
Current Bikes:Honda 929RR Fireblade, Honda CD200 Benly (Project), Stomp Z2 140
Electric Bike Project

[virus]

Pretty much the same as aff, soldering iron and the bits ya trim off cableties, cause im all about the cabletie efficiency


Cheers
John
____________________
own: 81 xs1100g...
owned: 85 rat CG (sold), 91 GS500e (stolen), 84 gsx400f (scrapped), 81 z250 (siezed, siezed, scrapped), 83 cb250rs (sold), 84 gpz750r ratfighter (killed) 84gpz400 (sold), '80 cb650 ratfighter (wrote off) 95gsx6/12f ratfighter (killed) 91 xj900 (sold)
stinkwheel Well I just had my hands up a pigs fanny. Which makes your concerns pale into insignificance.

[The Tot]

Pretty much as the above.

Most plastic fairings are constructed from ABS, so I get lego bricks and use it as "weld filler" - I've got a dedicated soldering iron which I use solely on plastics mind.

For a belt and braces approach, I slap on 2 part epoxy resin on the inner surface, and reinforce it with gaffa tape

I broke a fairing hole/mounting lug. Welding alone wouldn't fix it because of the vibration experienced. Gaffa tape reinforcement = winning.
____________________
The Tot 2019 Z1000SX - 2007 R1
Never argue with autism