[TR] Gas tak breather

[Randall]

> Your gas cap has a hole in it?  Must not  be stock.  

Every TR3 cap that I have had, had a hole that appeared to be original.
Including the one kindly sent to me by a lister after the original got
stolen on my previous TR3A.  Not through the chrome part, obviously, but the
inner plate that actually covers the opening to the tank.
http://goo.gl/y5uCn

And I've been blocking off the tank vent since about 1975, when I noticed
that it dumped raw fuel onto the road when turning left with a full tank.
No apparent ill effects, even running at full throttle for extended periods
of time.

Randall