Wildguzzi.com
General Category => General Discussion => Topic started by: Lumberjack on March 18, 2016, 06:33:55 PM
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Hi guys,
I have a Le Mans2 with a crack in the rear fender. ( Under the seat ) :sad:
Unlike the front fender it isn't plastic, but neither do i see any traces of polyester....
Is there anybody who can tell me what material it is made off?
Or how i can repair it?
Thanks for the attention.
John
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are you sure it isnt plastic?
Rick
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It is plastic. Drill a hole at the end of the crack, groove the crack out on both sides and repair with epoxy.
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:1: on plastic. What kind? Not sure.
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http://www.jbweld.com/products/plasticweld-epoxy-putty
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Yeah, any epoxy putty/plastic filler should work on the crack.
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Yeah, any epoxy putty/plastic filler should work on the crack.
It's not really plastic, it's vinyl, but you can be like everybody else and call it plastic. :smiley:
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are you sure it isnt plastic?
Rick
No, i'm not sure Rick, just thought it wasn't because the side panels are plastic and the fender is, in my opinion, something different.
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Thank you all for the swift reply :bow:
@dsrdave : already drilled the hole and grooved the crack out, now i will try to find something like JB Weld (Canuck750)
@canuck750 : unfortunately we can't buy it here in Europe. Will try to find something likely, maybe Loctite...
Anyway, thanks again to you all.
I will post a comment with the final result/solution, so it can be a help for other guys with the same problem.
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Any reputable name brand of epoxy should work well. I stay away from the one minute stuff. I use a standard marine grade epoxy, I also would mix some micro balloons in with it to reduce weight and it makes it a bit easier to work with and sand, the micro balloons are not necessary though. Good luck with the repair.
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Also I would search fo someone who can "weld" plastic. I have used such a repair on my motocross motorcycle's tank.
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Wrong kind of plastic to weld...
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I like to use JB weld 5 minute clear epoxy for this kind of repair, but I also cover the break with fiberglass cloth. The cloth sort of "melts" (not really, but it disappears) once you lay it over the wet epoxy and use an epoxy brush to go over it. I'd do a few layers.
Good luck.
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You can find fiberglass cloth at hobby stores where they deal with R/C airplanes typically. Or online. There are several weights, typically indicated by the coarseness of the weave.
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I've had good results repairing plastic & carbon fibre using Q-bond; http://www.ebay.co.uk/itm/Q-BOND-QB2-ULTRA-STRONG-ADHESIVE-AND-FILLER-REPAIRS-IN-TEN-SECONDS-/301433714308?_trksid=p2141725.m3641.l6368
'Super-glue' based so sets in seconds and I've found it more permanent that 'Araldite' (epoxy), the only downside is that you can't mould it when you apply as it sets instantly and leaves a rough surface so you need t sand it down rather than 'sculpt' whilst tacky.
Also works well on (non structural) alloy repairs.
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@canuck750 : unfortunately we can't buy it here in Europe. Will try to find something likely, maybe Loctite...
There`a lot of JB Weld on eBay
http://www.ebay.de/itm/JB-Weld-PlasticWeld-Plastic-Weld-Syringe-Quick-Setting-Epoxy-25ml-50132-/301681294217?hash=item463d9b3b89:g:A~AAAOSwu4BVmp2E
http://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2050601.m570.l1311.R1.TR2.TRC0.A0.H1.Xjb+weld.TRS0&_nkw=jb+weld&_sacat=131090
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I don't know how bad a crack this is but I too danced with a cracked rear fender on my CX in the same location. I patched it a couple of times until one day I hit the wrong bump in the road and the whole thing fell off including my license plate. Fortunately someone in a car stopped me and I retrieved the whole mess. After that I just bought a new rear fender and called it a day, so if it's a bad crack and the repair keeps cracking, beware.
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I have been doing plastic welding/repair for a few years , most of the plastic Guzzi uses or used back in the 80s-90s I find to be ABS. you can buy a bottle of abs glue like used for plumbing repairs, and test a small spot on the underside of the fender. it should "melt" the plastic some. you can use the abs glue to reinforce the fender from underneath, using stainless steel screen to bridge the crack. a good epoxy will also work, clean and degrease the part real good before starting any repair.
Rick.
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NOPE! Arizona Wayne says it's "vinyl".
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Hi guys,
It's been some time since i asked your advice concerning my rear fender.
I went to a specialised polyester/epoxy shop (VOS Chemicals) where they did some tests on the fender.
They told me it was made of polyester, but moulded under high pressure.
That's why you don't see any fiberglass cloth.
They assured me that i could repare it with polyester or epoxy, both with glass cloth.
I chose epoxy and although it was my first time with that stuff, result is a bulletproof fender.
I will try to post some pics.
Anyway, thanks again to you all.
(http://thumb.ibb.co/gq1RWF/CIMG2348_Small.jpg) (http://ibb.co/gq1RWF)
(http://thumb.ibb.co/fgM4Jv/CIMG2349_Small.jpg) (http://ibb.co/fgM4Jv)
(http://thumb.ibb.co/dHFmWF/CIMG2350_Small.jpg) (http://ibb.co/dHFmWF)
(http://thumb.ibb.co/hu425a/CIMG2351_Small.jpg) (http://ibb.co/hu425a)
(http://thumb.ibb.co/iMQmWF/CIMG2362_Small.jpg) (http://ibb.co/iMQmWF)
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Hi guys,
It's been some time since i asked your advice concerning my rear fender.
I went to a specialised polyester/epoxy shop (VOS Chemicals) where they did some tests on the fender.
They told me it was made of polyester, but moulded under high pressure.
That's why you don't see any fiberglass cloth.
They assured me that i could repare it with polyester or epoxy, both with glass cloth.
I chose epoxy and although it was my first time with that stuff, result is a bulletproof fender.
I will try to post some pics.
Anyway, thanks again to you all.
(http://thumb.ibb.co/gq1RWF/CIMG2348_Small.jpg) (http://ibb.co/gq1RWF)
(http://thumb.ibb.co/fgM4Jv/CIMG2349_Small.jpg) (http://ibb.co/fgM4Jv)
(http://thumb.ibb.co/dHFmWF/CIMG2350_Small.jpg) (http://ibb.co/dHFmWF)
(http://thumb.ibb.co/hu425a/CIMG2351_Small.jpg) (http://ibb.co/hu425a)
(http://thumb.ibb.co/iMQmWF/CIMG2362_Small.jpg) (http://ibb.co/iMQmWF)
So like "roto-molded nylon" then .
Dusty
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@oldbike54 : i have no idea what 'roto-molded nylon' is.
They explained me a few steps in the making proces :
1. A layer of resin is sprayed in a mold.
2. Fiberglass cloth is placed in the resin.
3. Another layer of resin is sprayed on the cloth.
4. Everything is pressed together.
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@oldbike54 : i have no idea what 'roto-molded nylon' is.
They explained me a few steps in the making proces :
1. A layer of resin is sprayed in a mold.
2. Fiberglass cloth is placed in the resin.
3. Another layer of resin is sprayed on the cloth.
4. Everything is pressed together.
Not the same then , sorry . Roto-molded nylon is used in some modern fuel tanks and fenders .
Dusty
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I guess I missed the start of this. I would have said fiberglass. The polyester refers to the type of resin. As Lumberjack discovered you can use either polyester or epoxy resin for the repair along with some more fiberglass cloth.
I didn't appreciate the difference in the resins until stories of fiberglass gas tanks failing with ethanol fuel. My Norton has an epoxy resin fiberglass factory tank. Guys who bought aftermarket polyester resin fiberglass tanks where getting their carbs clogged up with the melting resin. The epoxy stands up to the ethanol much better but still gets attacked. No clogged carbs though.
Pete
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It's like finishing off a surfboard. Fiberglass/resin over a surfboard blank.