K11 Owners Group

Tim (Midland Section) · Posted: Sat Sep 03, 2011 3:30 pm Post subject: Whiff of Gas (Petrol)

The fuel tank thread has reminded me that whether the tank is full or not my garage sometimes smells of fuel (BTW it isn't the Norton or BSA).
Not looked yet, too busy riding, but come winter, I want to find this.
Any ideas where best to look, no smart ass replies please, Ladies & Gentlemen?
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Regards Tim,

Grey haired riders don't get that way by pure luck
1996 Guzzi Cali3 LAPD
1972 750 Commando
G6HRN
#485

Shoganai · Posted: Sat Sep 03, 2011 5:54 pm Post subject: Re: Whiff of Gas (Petrol)

Inge K. · Posted: Sat Sep 03, 2011 7:32 pm Post subject:

I`ll guess some would evaporate through the lock barrel area in the filler cap.

Inge K.

Number 6 · Posted: Mon Sep 05, 2011 2:09 pm Post subject:

Could be the joint around the filler cap.
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94 K1100LT

Scott_Anderson · Posted: Mon Sep 05, 2011 5:47 pm Post subject:

Our tanks are vented. Originally the vent was connected the the crankcase thru a hose connection at the right rear of the fuel tank. If you have put in the accumulater cup then its possible to smell some fumes. Btdt.
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1995 K1100LT 0302044
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Stoked Steve · Posted: Mon Sep 05, 2011 6:21 pm Post subject:

I get a bit of a whiff now and then, especially if the tank is full. I just chaulk it up to normal venting.
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Steve
Virginia Beach, VA
93 K1100RS Mystic Red SOLD
12 Suzuki DL650A VStrom

rkildu · Posted: Wed Sep 07, 2011 9:23 am Post subject:

I have had the same issue with mine. I brought it up at a Paul Glaves K bike seminar at one of the nationals. He thought it was probably the accumulator cup.
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Rod Kilduff
97 K1100LT HighLine
82 R100Lufty

Tim (Midland Section) · Posted: Thu Sep 08, 2011 6:45 pm Post subject:

Thanks for all the replies. Could be any of the above. It started to smell in the last year. Usually after having been run, even if only to take it from the drive into the garage. Makes no matter whether tank is full or empty. However, I get the impression that it's coming from the fuel pipes, fuel rail or injectors. More vapour than leak at the moment IMHO.
_________________
Regards Tim,

Grey haired riders don't get that way by pure luck
1996 Guzzi Cali3 LAPD
1972 750 Commando
G6HRN
#485

pegasus · Posted: Thu Sep 08, 2011 8:45 pm Post subject: Fuel smell

Have a good look at the left hand side of your fuel tank, especially near where the fairing pockets meet the tank. The aluminium tanks develop pin holes, especially under / around / alongside where the fuel pump is mounted inside the fuel tank.
I could smell petrol for months before I spotted the pin hole in the tank of my 93 K1100RS. 2 part epoxy fuel tank repair fixed it. It's been there for 4 years so far and has stayed put.

cheers,

Andrew

Ernie-NH · Posted: Thu Sep 08, 2011 10:45 pm Post subject:

Hello Tim...

Just a thought,,, BUT check the area around the injectors to see if the vapour is strongest there. I mention this because the std. injector O-rings ( 7 x 3.52 Viton ) may have deteriorated, or damaged slightly during installation. No long ago we had an issue with fuel in the UK forming amines in the gas ( ie: static gasoline such as MIGHT occur if either the lower or upper o-rings had a slight leak allowing a tiny pocket of gas to sit idly ) and thus causing the rings to soften and promote permeation. IF the rings have not been replaced with a known fluroelastomer (FKM ), but perhaps the local AutoStore variety, it could be a cause for a potential leak or weep, and thus the vapour that you detect.... JUST a thought !!

Very best regards.....// Ernie in NH
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Tim (Midland Section) · Posted: Tue Sep 13, 2011 7:33 pm Post subject:

Well Ernie & Andrew, those were two of my initial thoughts. Not quite as comprehensive as in Ernie's reply. Now I know what size & type of O ring to buy before I get the spanners out this winter. Will report findings when I cease regular riding.
_________________
Regards Tim,

Grey haired riders don't get that way by pure luck
1996 Guzzi Cali3 LAPD
1972 750 Commando
G6HRN
#485