[TR] float bowl vent.......randall?

[Randall]

> am interested in hearing more about
> the
> clips on the float bowl vent valves.  are those inside the float bowl?  I
> think i have my floats set right.............are these differant than
> setting float level?

Yup, the lever that operates the vent is outside the carb; and is different
than adjusting the float level.  Apparently there were at least two
variations, as the one that Nelson shows on the Buckeye Triumphs site
http://tinyurl.com/qn8yzw
is different than the one on my 73 Stag and in the factory emissions manual.
http://tinyurl.com/p6t2qk

In the second photo, the clip is that black band visible behind the
adjustment screw.  I removed the screw entirely, then slid the clip off and
bent it with my fingers.

What the valve does is close the bowl vent connection to the air cleaner and
open it to the carbon canister, when the throttle is closed.  This both
helps ensure that any fumes are directed to the carbon canister when the
engine is turned off; and makes the anti-runon solenoid work.  (The ARS
applies vacuum to the float bowls through that valve, to stop fuel going
into the engine.)

Strange idle problems have also been caused by the vent valve being sticky
or stuck, so also check that it moves freely.

-- Randall