In 12/22/2011, I posted how to make an easy repairs on MC body parts. Since then I have noticed many of older bikes having ABS body parts have failed long before most bikes are ready for retirement. Last week I repaired my rear ABS tail section. I'm sure we all realize mounting tabs can become failure area. I will attempt to outline a simple method on how I make my repairs, such as a hair line crack, repair broken mounting tabs, and how to make missing mounting tabs. I repaired a hairline crack that was a little 2 inches long, and completely rebuilt two badly broken tail assembly tabs. It would be helpful to revisit my earllier posting if you plan to make any ABS body repairs. http://www.vfrdiscussion.com/forum/index.php/topic/69704-easy-repair-methods-for-plastic-mc-body-parts/#entry815472.
About a month ago I notice a small hair line crack on my right side tail section. I made a quick temporary repair, because I notice the crack moments before I left for a ride, and I didn't want the crack to become worse. My temporary repair was super quick, I placed a piece of clear packing tape over the crack, certainly not the best type of repair, but it works! My plan was to later remove the rear tail section to make a proper permanent internal glass repair at my first opportunity. Then about two weeks ago my tail section was beginning to separate along the back of my seat cover. I knew the fairing's separation was related to it's internal mounting tabs had failed.
To make any ABS repairs you will need to remove your ABS body part as required and you will want to study the supplied photos.
Removed your body part, all small fasteners with broken plastic tab parts should be placed into a small plastic sandwich bag, Take care not to lose any of your broken plastic pieces, Fit check your broken plastic parts, clean them with a brush and alcohol, then carefully CA glue all your small broken plastic parts back together. The CA will dry in less than a minute. I would suggest to use a medium thickness CA, and fill your gaps with CA and baking soda. Be extra careful not to get any CA on the outside of the your fairing's painted surface, because it will make a terrible mess!
Next I removed the clear packing tape on the outside of my firing that protected the fairing;s hair line crack, then sand, clean the back side area of the cracked area again using alcohol, and a paper towel. One the back side of the crack surface has been cleaned, then lightly put a few drops of CA on the damaged area, and rub the glued area to insure the CA has properly adhered to the damaged area. Be sure to to fill all void repairs in your broken tabs. All tabs must to be glued back, and aligned straight as possible. Study how your repaired tabs interconnect to another. The two sides where the tabs interconnect to one another must be flat, and true to one another. It's on the opposite of the tabs is where they don't make contact with it's mating tab is were you will want to reinforce repair areas with fiberglass and epoxy slow cure laminating resin, not polyester resin.
In the event you're missing tab, mold a temporary tab with modeling clay, fit check as required, adjust, then carefully cover one side of your clay tab with two plies of 2 oz. fiberglass cloth, and rub CA into your cloth. Next using a dental pick, extract the modeling clay, and apply at least one ply of 2 oz. cloth to the opposite side where the clay was removed. Finally sand your newly formed tab, clean double check fitting, and fiberglass as you will with your broken repaired tabs as stated below.
Carefully mix your epoxy laminating resin, allowing a small amount of laminating to be thickened with micro-balloons to resemble mayo. Brush the thickened mayo resin on the flat portion of your tabs where they mate to one another, Then apply two pies of 2 oz. cloth, repeat the same process of the opposite sides of the glued tabs, and apply 3 plies of 2 oz cloth, followed by 3 plies of 6 oz. cloth. Allow the resin to set firm, but not cured and trim the cloth with an exacto. file, and sand the tabs accordingly. Your repaired tabs are now good to go, once you opened up the screw through holes. Your tabs will prove to be very strong. If you are planning to paint your fairings, I'd recommend to reinforce all your tabs accordingly to insure your remaining tabs don't fail at a later date.
The fairing having a hair line crack was be backed with at least one ply of 2 oz. cloth after the CA had been applied, followed by 3 plies of 6 oz. cloth. I found it necessary to rub out the painted crank are on my fairing, then polish it, then wax all the repaired fairings,
There are other ways to repair broken, or missing tabs, and even a cracked fairings, but the method I described has proved to be very successful. The last photo shows a repaired fairing, and my custom epoxy fiberglass seat cowl.
NOTE: 12/12/2013 Update
Should you have used 3-4 generation body parts in need of repairs, and you aren't interested in them, please contact, because I do buy used parts.
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NOTE: 5/11/2013 Update
The other day I was having a discussion with a resin chemist. He concurred the materials, and the methods I've suggested do work with ABS fairings. This chemist largely works in the automotive sector, who works with ABS, and with both epoxy and polyester materials. He mentioned several reasons why polyester resins don't work very well with ABS types of repairs. Two reasons he stated, were polyester resins have a higher shrink value than epoxy laminating resins, and they cure too rapidly which affects the bonding to ABS materials. There were other factors mentioned. I wanted to update this early posting, because it's in the beginning of my discussion on how to make ABS repairs.
NOTE: 5/11/2013 Update
This posting covers a great deal of material, so I posted a set of photos showing what can be done to a bike that has been badly damaged. This posting covers all the necessary techniques on how to make the repairs shown in my below slide show. My last posting has information pertaining to all the slide show photos on page 8. http://s775.photobucket.com/user/vfoam/slideshow/Ninja%20Work
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Edited January 9, 2014 by Resin