Someone once mentioned they had success with Ultralight Aircraft
fittings in plastic cycle tanks. I never tried it, but here's the
link that was given:
http://www.rotaxparts.net/scripts/prodList.asp?idCategory=60

A rubber grommet fits into the tank, and the petcock pops into the
grommet. It doesn't strike me as a very secure arrangement, but
people taking tiny airplanes up in they sky seem to be trusting it.



--- In MAICOMOTORCYCLES@yahoogroups.com, "David Barr"
<dbarr33702@...> wrote:
>
> Quick question. I have a couple of old plastic tanks (PMC tanks
from
> the 1970's). The petcocks are starting to leak and break (parts
of the
> petcocks are made of plastic), and I would like to get modern
> replacements. The problem is finding ones that will fit and mount
onto
> the tanks. The original petcocks screwed into a bolt-like
attachment
> that was bolted into a 3/4" hole in the bottom of the tank.
Anyone
> have any ideas of what would work?
>
> Thanks
>
> David Barr
>