K11 Owners Group

philosophicalzombie · Posted: Mon Jun 10, 2013 2:15 pm Post subject: Post-vent mod, and I still suck.

So I did the vent mod by capping off the vapor hose (runs to the crankcase) and running the line down by the right foot peg alongside the rain drain hose. I also performed a routine flapperectomy. I did this because I was getting massive tank suck on hot days, and experiencing the stall at idle problem as well.

So despite these measures I still got a big suction upon opening the gas cap. I'll take it out in a bit (and it's HOT in Boulder right now) and see if I'm stalling at idle. It's my understanding that stalling at idle is caused by suction in the tank...or is it an over-rich fuel mixture, as stated in the tech update I used (thanks Rich!)?

Blake

ps: Great to join the group!
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Blake
Mariposa, CA

1993 K1100RS Mystic Red

whyoldbill · Posted: Mon Jun 10, 2013 2:27 pm Post subject:

Welcome Blake.
Could it be that the vent line is clogged, either the hose or the steel line inside the tank?
If I remember right it is a pretty small tube inside the tank, it would not take much to plug it up...

Regards,
Bill
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'02 - GL1800

The desired effect is what you get when you improve your interplanetary funksmanship - George Clinton

Jim · Posted: Mon Jun 10, 2013 10:33 pm Post subject: gas tank vent

Blake,

Welcome to K11OG!

Put a piece of tubing on the nipples one at a time) under the tank and blow through it. One is the rain drain, the other is the tank vent. If I recall correctly, you should be able to blow through both - I don't remember which is which - but you'll find out.

If you get the air accumulator, you only need one hose running down from the tank.

http://k11og.org/forum/viewtopic.phpt=5484&highlight=air+accumulator
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Jim
1997 K1100LTSE 94,000 - still has gremlins!
1995 R100RT Classic 16,650 crashed - repaired!
1992 K75RTP 46,000

"We shall not all die, but we shall all be changed."

philosophicalzombie · Posted: Tue Jun 11, 2013 12:15 am Post subject:

I no longer suck. New tubing was kinked. Now I'm getting an occasional drop or two of fuel out the drain, no pressure in the tank, and no stall at idle on hot days (like today on the Front Range in Colorado: over 90).

Thanks for the replies!

Blake
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Blake
Mariposa, CA

1993 K1100RS Mystic Red