Oil Everywhere

[trevinoz]

I gather that the valve, in the case that I saw, failed after the bike had been standing unused for some time.
I think that the oil between the valve and the pump had drained away leaving the section dry and the pump unprimed.
As we know, an unprimed pump will not start by itself!.I would rather put up with wet sumping than put ANY device in the feed line.

Trev.

[beezermacc]

That makes sense. If the pump empties, stirring fresh air is unlikely to create enough of a vacuum to prime the pump.