2013 V7 Stone Tank Venting Issue?

[sib]

Well, that would explain all of your symptoms.  A plugged vent to the air would allow the connection to the intake manifold to build up vacuum in the fuel tank.  My suggestion would be to leave the canister on, so we can all breathe a little less pollution, and not ride with the canister under muddy water.  More seriously, this seems like a freak accident.

[Kev m]

There is a nipple on the right side of the EVAP canister that has never had a hose attached to it.   It was filled with mud and grit.   When I poked a small allen key into it, it would not go in, until suddenly it did go it.  Seems like there is a flap or valve in there, and it was sticky--but now it's not.  (Or I  broke it)

Anyway, since poking at that thing, the problem seems to have gone away.  I've run about 150 miles; opened cap repeatedly, no vacuum. 

Yup, that was what I was thinking...

[rodekyll]

Goodonya for finding and fixing the problem!

I'm wondering if it was mud or a mud dauber that plugged the vent.  It's one reason we do a walk-around before we put an airplane into the sky.  I've knocked all sorts of tiny critters out of my pitot tubes and air cleaners.

[SmithSwede]

Do *not* get me started on $:&8/$ mud daubers.   They are all over my rural home. 

Little nasties took down my Ninja 250 last year.  Built a nest overnight in the snorkel to the air filter.   Bike would start, idle, and run fine at 0-50% throttle, but otherwise bog.  Drove me nuts. 

I changed plugs, checked valve clearance, cleaned air filter, replaced igniters, ECU.  Nothing worked.  Until a guy on 250 forum mentioned similar issue due to girl friend spilling her gummi bears doen into intake snorkel.   So I poked a wire through long snorkel, and sure enough...out come freshly made dirt dauber nest. 

And to think.  Each nest contains a paralyzed, zombie spider stung by Mama Wasp to feed the hatchlings. 

[rodekyll]

I had a spider living in a bolt hole in a frame leaning on the wall.  It was a happy little spider and I liked watching it run around the frame tubes looking for whatever spiders look for.  One day a wasp swooped down and the spider scampered for safety.  The wasp didn't really go after it until it had disappeared into his hole, but as soon as it did, the wasp was all over it.  I could hear wings batting, and I'm sure there was a little scream. .  . . .

After a few seconds some spider legs scratched at the mouth of the hole and got dragged back inside.  Then the wasp flew out again.  less than an hour later the bolt hole was plugged with mud.

[sib]

I had a spider living in a bolt hole in a frame leaning on the wall.  It was a happy little spider and I liked watching it run around the frame tubes looking for whatever spiders look for.  One day a wasp swooped down and the spider scampered for safety.  The wasp didn't really go after it until it had disappeared into his hole, but as soon as it did, the wasp was all over it.  I could hear wings batting, and I'm sure there was a little scream. .  . . .

After a few seconds some spider legs scratched at the mouth of the hole and got dragged back inside.  Then the wasp flew out again.  less than an hour later the bolt hole was plugged with mud.

Nature, red in tooth and claw.  Except that spider "blood" (hemolymph) is more likely to be pale blue.