[LiquidSilver]

Thanks, I'll have a look at that grommet. Kinda sounds like a warranty issue on a brand new bike, no?

I've noticed no unusual fuel consumption, and AFAIK it's always been positive pressure.


(side note: Kudos to the admins of this site! The 'suggested related topics,' across to the other forums, which I may not frequent as much, is a REALLY NEAT feature! *pretty slick technology, too* Excellent!)

 

[LiquidSilver]

mmkay... I looked at the grommet, it looks fine, not mushed or anything. Mates up to a little hole in the fuel cap door. Anybody know where a check valve would be?

Now I'm even more sure it only holds positive pressure. I filled it up hot, and after cooling overnight, there was zero pressure (in or out) behind the cap. But when I start it and get it warm again, and open the tank... PFFFFFT!!


Thanks.

 

[LiquidSilver]

Found it!

The large vent hose under the tank was being pinched by one of the fuel pump assembly bolt heads. The hose bears the mark of the bolt head. I twisted it slightly and made sure it was routed clear of that bolt head.

I think that's the end of the story...

 

[LiquidSilver]

It's real easy to pinch so it's a good idea to monitor it carefully everytime you lift the tank and then set it back down.

I hear that! I'm thinking it was that way before they 'prepped' it, when I took delivery. It's been up and down several times since, and I didn't think to look at it.

 

[LiquidSilver]

Update: 2 weeks ago, it started doing it again, and sure enough... the hose was pinched again, but this time against the top of the head.

All of the pressure must've been taking it's toll on the gas cap... because after I unpinched the hose and finally found where it's SUPPOSED to lay... the fuel cap was weeping in my lap while riding. No prob through the Aerostich, but the smell was quite strong... so a couple nights ago... I decided to disassemble the fuel cap and check it out. I'm SUCH an idiot.

When I removed the final screw, the filler door flew into tiny pieces like Pandora's pocket watch - pingngng... complete with plunk, plunk, plunk, pieces falling into the full tank. (don't even say it, I'm an idiot.) Tiny springs and a ball bearing the size of a gnat shit. It was that sinking feeling of knowing, "this is going to be expensive."

Well, thanks to my little magnetic stick 'getter' and the ferrous nature of all the pieces... every piece retrieved, (did I mention, I'm an idiot) and after three hours of trial and error, all of the pieces - present, accounted for, and working properly. The closure piece, with the rubber ring around it, is pressed into the opening with 4 springs... I guess the pressure in my tank had that closure piece squished down and stuck that way.

One great thing I learned, when working with tiny metal pieces, try to do it where your nose is more than 3 inches from an open gas can... and dopple every teenie-tiny piece with grease, so they stick in place while you assemble.

Anybody need their Rolex fixed? (by an idiot?)



It works great now, nice and smooth, with no farts.

Now I hope THAT's the END of the story.