Greg Bender
http://www.thisoldtractor.com/gtbender
Thanks to Marvin Mayo and John Prusnek who posted this information on the Yahoo! Loopframe_Guzzi news group in reply to a post from Charlie Mullendore of Antietam Classic Cycle. In Charlie and Marv's and John's own words:
I'll be recovering the '71 Ambo's seat with the nice cover from Harper's and wondered if anyone had something better than what I've been using in the past to attach it. I've tried regular old contact cement and 3M Weatherstrip Cement and neither does much of a permanent job. The cover always seems to come loose eventually and needs to be stuck back on. Don't want to resort to riveting it on as I've seen done.
Any "magic" stickum that's worked for you?
About 15 yrs ago I sewed a new cover for may son's V50II & installed it w/ an adhesive. I used lots of clothespins to clamp the cover to the seatpan 'til it dried. I'm almost certain that the adhesive was Pliobond. The adhesive still holds but his dog ate the top of the seat a couple of years ago. IIRC Pliobond's most common usage is in shoemaking & shoe repair. Don't buy a lot of it, 'cause it will set up on you while stored on the shelf.
Ashland Pliobond Adhesive (also available and local harware stores such as Ace)
As a hippie I had a leather shop and made lots of sandals, glued them together with 'Barge' contact cement. If you can find a shoe repair shop they should have a tube. The trick is to coat both surfaces, let them dry well, and clamp them together very well and evenly, maybe fixture up a couple of thin metal or wood strips and lots of c-clamps.
You also may consider using some quilt batting between the seat and cover, glued on with spray adhesive, helps to even out the seat if the foam's funky.
I haven't had the pleasure of recovering a Guzzi seat, but some honda seats I've done are made of plastic thick enough to drive short staples into, others had sharp V notches on the inside pointing up, just stretch the cover over and hook it on, which was a simple and elegant way to attach the cover.
Barge All Purpose Cement manufactured by the Quabaug Corporation (also available and local harware stores such as Ace)