My '87 Guzzi has a plastic rear fender and has numerous cracks .
Part no longer available, I've got a Moto Guzzi salvage shop looking for a replacement part I contacted them 6 months ago and check in about every month to see if a part has been found, up to today no luck .
From what I've been able to research, only about 125-150 of these bikes were imported into the US .
Can't ride the bike, the rear turn signals come loose in about 20 minutes of riding and hang from the wires .
So now I'm going to try plastic welding and then reinforce the underside of the fender with fiberglass cloth .
Tried welding plastic at work, had some damaged parts where the ultrasonic welds broke .
First attempt not so great, it held, but looked pretty lousy !!!
Found a plastic welding tool from Harbor Freight a tool store with most products made in China, as one member from AU said about this type of store, ' cheaper than chips ' type tools !!!https://www.harborfreight.com/80-watt-iron-plastic-welding-kit-60662.html
I start my annual 7 week vacation on Nov. 10, I'll remove the fender and have a go at it .