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1Back to top Go down   WTB Gas Filler Cap Empty WTB Gas Filler Cap on Tue May 31, 2016 12:22 pm

KyleMB

KyleMB
active member
active member
i have the 85 push button gas cap and it leaks / emits fumes terribly so i need the updated gas filler cap.

send me some photos here or i can PM you my email or tele #

thanks in advance

-K


__________________________________________________
1988 K100 LT
    

2Back to top Go down   WTB Gas Filler Cap Empty Filler Cap and Fumes on Wed Jun 01, 2016 7:33 pm

elementalfire

elementalfire
active member
active member
A replacement gasket kit 16119062461 may go a long way in remedying your issue although they are getting very hard to find. I am in Canada and had to order one from Hap's Cycle in Sarasota, Florida.

elementalfire

    

3Back to top Go down   WTB Gas Filler Cap Empty Re: WTB Gas Filler Cap on Wed Jun 01, 2016 7:37 pm

KyleMB

KyleMB
active member
active member
@elementalfire wrote:A replacement gasket kit 16119062461 may go a long way in remedying your issue although they are getting very hard to find. I am in Canada and had to order one from Hap's Cycle in Sarasota, Florida.

elementalfire

I plan on getting the rubber ring around the cap mount, but from what I've read the 85 push button caps are notorious for leaking and right now a splitting headache from all the fumes.


__________________________________________________
1988 K100 LT
    

4Back to top Go down   WTB Gas Filler Cap Empty Re: WTB Gas Filler Cap on Mon Apr 08, 2019 11:27 pm

Flip2

Flip2
Silver member
Silver member
hi to the k100 group after a very long time! my 86krs has the same prob with fumes coming out of the filler cap and is a major deterrent to riding. Kyle mb did the replacement kit solve your issue ? does everything in the repair kit get used or does it vary by model, it looks like there is a seal in the kit my cap doesn't have ( looks as it goes around the lock area) ? any trick to dissamembling the part with the wide thin seal ,gently pry ?

    

5Back to top Go down   WTB Gas Filler Cap Empty Re: WTB Gas Filler Cap on Tue Apr 09, 2019 11:54 am

duck

duck
Life time member
Life time member
@KyleMB wrote:i have the 85 push button gas cap and it leaks / emits fumes terribly so i need the updated gas filler cap.

send me some photos here or i can PM you my email or tele #

thanks in advance

-K
PM sent.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

6Back to top Go down   WTB Gas Filler Cap Empty Re: WTB Gas Filler Cap on Tue Apr 09, 2019 6:54 pm

KyleMB

KyleMB
active member
active member
The replacement kit will help if your seals are bad. In my case I ended up getting a new gas cap.
I kept my original lock so all the keys would still be the same and somehow gas occasionally seeps from the key hole. Not sure how to fix that. So seals there.


__________________________________________________
1988 K100 LT
    

7Back to top Go down   WTB Gas Filler Cap Empty Re: WTB Gas Filler Cap on Sun Jul 14, 2019 9:37 pm

Flip2

Flip2
Silver member
Silver member
HThanks for the input. Out riding today and the auto in front of me was emitting sweet fumes of an unknown origin , say around 4:20. I'm sure I would ride more often if my bike smelled like that. Very Happy

I installed the thick foam gasket on the inside top of the gas cap and that has helped some with the fumes. But I would still like to have less, is this possible? Has anyone gone on a search and eliminated fumes elsewhere on the bike?

 My exhaust doesn't seem abnormally loud( I guess it could still be leaky),I replaced the seals around the fuel injectors and the boots on the air box years ago . The bike doesn't smoke, unless it is on the side stand for awhile but that burns off in short order.

    

8Back to top Go down   WTB Gas Filler Cap Empty Re: WTB Gas Filler Cap on Sun Jul 14, 2019 11:24 pm

Laitch

Laitch
Life time member
Life time member
@Flip2 wrote:I installed the thick foam gasket on the inside top of the gas cap and that has helped some with the fumes. But I would still like to have less, is this possible?
Is your moto's fuel tank vent clogged? That might cause an increase of pressure within the tank that could allow fumes to breach the gasket seal. Blow some compressed air through it via its port attached to the underside of the tank. Does that port dump into a cup on the frame that has a hose attached to it, or does a hose attach to the port directly then exit behind the right foot peg plate?


__________________________________________________
1995 K75 73,000 miles
WTB Gas Filler Cap Usa-lo10
    

9Back to top Go down   WTB Gas Filler Cap Empty Re: WTB Gas Filler Cap on Mon Jul 15, 2019 3:14 am

volador

volador
Silver member
Silver member
Forward tubing/nipple- Tank Vent
Rear tubing/nipple- Rain Drain

WTB Gas Filler Cap 1989k110



Last edited by volador on Mon Jul 15, 2019 4:08 pm; edited 1 time in total


__________________________________________________
1984 K100RS  1991 K100RS  Reap The Wild Wind... Ever Commute Is An Adventure
    

10Back to top Go down   WTB Gas Filler Cap Empty Re: WTB Gas Filler Cap on Mon Jul 15, 2019 4:41 am

nino

avatar
Life time member
Life time member
Do you have 85 push button cap on 85 tank? Its important because earlier cap has a breather, but later tank has a breather tube from fuel pump to cap. 
What happened to me this very hot days? I mounted 86 cap on 84 tank and experienced vapor lock very often. Engine stopped and I had to open cap to vent it. Bike started normally after few minutes. Very inconvenient in city traffic.
Finally I removed 86 cap and mounted first type 84 cap on may 84 tank. No vapor lock any more.

    

11Back to top Go down   WTB Gas Filler Cap Empty Re: WTB Gas Filler Cap on Mon Jul 15, 2019 7:23 am

92KK 84WW Olaf

92KK 84WW Olaf
Life time member
Life time member
I will add to the confusion.....my 84 K100RT does not have a push button cap and fairly sure it never had. All runs ok and its been running in 35C+ temperatures without any issues.

My new RS does have push button cap......now its good to know about the venting.


__________________________________________________
1992 K100LT 0193214 Bertha Alaska Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 58,645 now 98,780 miles
1983 K100RS 0011171 Fricka 29,495 miles Damn K Pox Its a Bat outta Hell No 32,600 miles
    

12Back to top Go down   WTB Gas Filler Cap Empty Re: WTB Gas Filler Cap on Mon Jul 15, 2019 7:51 am

nino

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Life time member
Life time member
I went for 500 km round trip on very hot day - 35 in shade, maybe 50 on the road. I noticed engine run poorly on custom control and on crossroads. I tried to cool with kill switch but it was mistake. After a minute with engine off on traffic lights it didnt restarted. What happened? When switch of engine without fuel recirculating it started to evaporate. No proper cylinder feed. 
After three minutes and several tries and after opening tank cap it started again.
When came home I decided to mount old cap which belonged to 84 tank and try to replicate problem. It never happened again even in dense city traffic. Look to me that tank with old cap was a bit cooler than with 86 cap. 
Regards

    

13Back to top Go down   WTB Gas Filler Cap Empty Re: WTB Gas Filler Cap on Mon Jul 15, 2019 7:53 am

Laitch

Laitch
Life time member
Life time member
@92KK 84WW Olaf wrote:I will add to the confusion.....my 84 K100RT does not have a push button cap and fairly sure it never had. All runs ok and its been running in 35C+ temperatures without any issues.

My new RS does have push button cap......now its good to know about the venting.
The push-button cap is not recommended and its foibles are described in this fiche entry.
WTB Gas Filler Cap Screen56


The recommended cap is this.
WTB Gas Filler Cap Screen57



Last edited by Laitch on Mon Jul 15, 2019 8:12 am; edited 1 time in total


__________________________________________________
1995 K75 73,000 miles
WTB Gas Filler Cap Usa-lo10
    

14Back to top Go down   WTB Gas Filler Cap Empty Re: WTB Gas Filler Cap on Mon Jul 15, 2019 8:01 am

nino

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Life time member
Life time member
Yes, I changed 84 for 86 cap after I saw that warning on the forum. But may experience was opposite. I ll stick to old cap

    

15Back to top Go down   WTB Gas Filler Cap Empty Re: WTB Gas Filler Cap on Mon Jul 15, 2019 11:02 am

volador

volador
Silver member
Silver member
@nino wrote:Do you have 85 push button cap on 85 tank? Its important because earlier cap has a breather, but later tank has a breather tube from fuel pump to cap.
Dobar Dan Nino

Your '84 fuel tank has no breather/vent tube?
Is this a difference between Euro and US models?

WTB Gas Filler Cap Silver10


__________________________________________________
1984 K100RS  1991 K100RS  Reap The Wild Wind... Ever Commute Is An Adventure
    

16Back to top Go down   WTB Gas Filler Cap Empty Re: WTB Gas Filler Cap on Mon Jul 15, 2019 1:42 pm

92KK 84WW Olaf

92KK 84WW Olaf
Life time member
Life time member
My 84 K100RT tank looks like that one, bolted down and with the electrical plug at the front left........but it has the later fuel cap AND the two spigots that come out under the tank........and they are not in that photo either

Does this mean there are two types of early tank....?? Something I was completely unaware of. Need to look under the tank on the RS...


__________________________________________________
1992 K100LT 0193214 Bertha Alaska Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 58,645 now 98,780 miles
1983 K100RS 0011171 Fricka 29,495 miles Damn K Pox Its a Bat outta Hell No 32,600 miles
    

17Back to top Go down   WTB Gas Filler Cap Empty Re: WTB Gas Filler Cap on Mon Jul 15, 2019 4:41 pm

nino

avatar
Life time member
Life time member
I dont have breather tube which goes from fuel pump filter to cap like on 86 model. My original fuel pump filter wasnt connected by plastic tube with top of the tank.  
I believe early 84 cap has some ventilation.

    

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