Join Date: Sep 2004
Location: Medford, County of Jackson, Oregon, USA
Model: None at present
Fiberglass (polyester resin) and epoxy really doesn't bond all that well to ABS which is what the trunk is made of. You can use ABS cement, it's the black goop sold in hardware store plumbing sections for gluing ABS pipe. Not the PVC/ABS cement, but black ABS only cement. You can lay up a layer or two of fiber glass cloth with the stuff. Don't put a lot of heavy coats on at one time, a thin coat allowed to dry hard before the next one works best. The stuff does take a bit of time to fully harden but will result in a chemical weld to the original plastic. You can't pry it off like you can with fiberglass resin and epoxies. Just clean any paint off the underside of the trunk lid in the vicinity of the repair.
If you have a trunk rack it should have a good sized star washer (sold by online bike vendors) under the legs of the rack, a rubber washer under that and a rubber washer and fender washer underneath the trunk lid. This will help spread the load without causing as much of a localized stress rise.
None at present
Past 'Wings: GL1100, GL1200, GL1500, GL1800
Current BMW C650GT