Author Topic: Repairing cracks in plastic mudgaurds  (Read 467 times)

0 Members and 1 Guest are viewing this topic.

Offline Big Scotty

  • C-Grade
  • **
  • Posts: 121
  • Heaven 380
    • View Profile
Repairing cracks in plastic mudgaurds
« on: October 18, 2017, 08:03:35 PM »
Gray
Has any body had any luck repairing cracked mudgaurds,welding,gluing etc,I don't need it to look flash its on our old quad I'm fixing up for the grandkids to ride,any help appreciated
Cheers scotty
yz400d yz125d ktm380exc

Offline LWC82PE

  • Superstar
  • ******
  • Posts: 5688
    • View Profile
    • PE motorcycles & SuzukiTS.com
Re: Repairing cracks in plastic mudgaurds
« Reply #1 on: October 18, 2017, 08:41:45 PM »
Yep get a plastic welder and the right filler rod or use some scrap plastic from an identical fender. Cut into strips.
Wanted - 1978 TS185 frame
Orange Don Vesco/MS/Windsor tank
ADB Mags (vol 2 no.2) nov/dec 77& jan/feb 78 (vol2 no.3)

Offline gwc

  • C-Grade
  • **
  • Posts: 68
    • View Profile
    • WayCool VMX Racing
Re: Repairing cracks in plastic mudgaurds
« Reply #2 on: October 19, 2017, 09:00:01 AM »
I have had some success  with hot craft glue drill a small hole at the end off the crack, if it is a long crack maybe a couple along it, tape the outside,  taper the inside and glue away
Best of luck
Suzuki RM250d, PE 250 c, WRf250, Multistrada 1000s
Heaven #162

Offline djr

  • C-Grade
  • **
  • Posts: 75
    • View Profile
Re: Repairing cracks in plastic mudgaurds
« Reply #3 on: October 19, 2017, 09:24:19 AM »
some people have success using an electric soldering iron and a cable tie as your 'welding rod'
whatever method you decide to use , if possible try and practice on an unseen area of the part
good luck

Offline pokey

  • Legend
  • *****
  • Posts: 1233
  • Arse .. Elbow. Know the difference
    • View Profile
    • FB
Re: Repairing cracks in plastic mudgaurds
« Reply #4 on: October 19, 2017, 01:02:56 PM »
Clean it well with Isopropyl and the previously mentioned zippy tie and soldering iron  do work.
Best thing to remember is kids love stickers. lots and lots of stickers ;)

Offline Big Scotty

  • C-Grade
  • **
  • Posts: 121
  • Heaven 380
    • View Profile
Re: Repairing cracks in plastic mudgaurds
« Reply #5 on: October 19, 2017, 08:29:39 PM »
Gday
Some good ideas there thanks fellas,I am going to try a few of these methods under the seat were there is a few short crack to see what works best before attacking the large ones further down the guards.just waiting on some parts to get the engine running if I have no luck with that I probably won't worry about the gaurds????????
yz400d yz125d ktm380exc

Offline Tex

  • Legend
  • *****
  • Posts: 1281
    • View Profile
Re: Repairing cracks in plastic mudgaurds
« Reply #6 on: October 20, 2017, 10:41:19 AM »
Ugly but effective method is to cut some flexible sheet metal and pop rivet or screw it to the plastic guard on the underside. I'd also drill a small hole at the end of the split too.

I'd rather do this than remove guards completely.

Tex

Offline Big Scotty

  • C-Grade
  • **
  • Posts: 121
  • Heaven 380
    • View Profile
Re: Repairing cracks in plastic mudgaurds
« Reply #7 on: October 20, 2017, 05:28:04 PM »
Ha ha tex,there's more pop rivets and bits of plate than there is plastic on this mudgaurd,thought I would try welding the cracks combined with rivets and plates,it seems you repair one crack and two start somewhere else
yz400d yz125d ktm380exc

Offline martian170

  • C-Grade
  • **
  • Posts: 60
    • View Profile
Re: Repairing cracks in plastic mudgaurds
« Reply #8 on: October 22, 2017, 01:25:24 AM »
Interesting thread I also need to do this in the off season ( Crack in IT 200 tank) on the seam. Been told Bunnings sell plastic welding kits , used a heat gun in the past with mixed results

Offline evo550

  • Legend
  • *****
  • Posts: 2391
    • View Profile
Re: Repairing cracks in plastic mudgaurds
« Reply #9 on: October 22, 2017, 07:00:46 AM »
Interesting thread I also need to do this in the off season ( Crack in IT 200 tank) on the seam. Been told Bunnings sell plastic welding kits , used a heat gun in the past with mixed results

My experience with welding tanks is it's not a long term solution, spent way to many times rewelding. Seems as though the tank flexes to much when being used and it tank just starts leaking again, usually a long way from where you need to be...

Offline Scriberman

  • Novice
  • *
  • Posts: 5
    • View Profile
Re: Repairing cracks in plastic mudgaurds
« Reply #10 on: November 14, 2017, 07:31:50 AM »
I've had some success with melting a staple into the plastic, there are proper machines for it but I used a blowtorch and soldering iron.  https://www.youtube.com/watch?v=dsoxXsksNvY