Wrist pin puller tool
Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models
I extracted this recommendation from Charlie Mullendore of Antietam Classic Cycle off of the Yahoo! Loopframe_Guzzi news group. In Charlie's own words:
I made a wrist pin puller out of a PVC pipe nipple, a 3⁄8 inch stove bolt w/nut and some washers. Ground the head of the stove bolt down to the same diameter as the piston pin and wrapped a little duct tape around the shaft so that it would fit into the pin snug. Cost me about USD $2.00 and worked just fine.