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1Back to top Go down   Help! Broken fuel tank barb Empty Help! Broken fuel tank barb Wed Nov 12, 2014 3:06 am

KJustin

KJustin
Silver member
Silver member
As I was removing my fuel tank I broke off the barb where one of the fuel lines attaches to the tank. Its broken clear back to the weld so I have nothing to which to attach the fuel line.

The other barb on this tank appears to have been replaced by a bolt-in/on unit, which is much more sturdy than the barb that I broke.  I'm assuming that this is the solution for the barb that I broke.

Can anyone tell me where to get one of these bolt-on barbs and tell me anything I need to now about fixing this problem (I've searched around the forum and internet and I can't find any info about any of this)?  Or, if I need to buy a new tank, please break the bad news to me gently (and let me know if you have a tank for sale).  Thanks much!

    

2Back to top Go down   Help! Broken fuel tank barb Empty Re: Help! Broken fuel tank barb Wed Nov 12, 2014 3:11 am

Two Wheels Better

Two Wheels Better
Moderator
Moderator
The aluminium welder you choose should be good at his job, so should the painter because it'll likely need a respray after the heat of welding. There are a lot of variations in the tanks and it helps us to know what year/model bike you're referring to. For example, a pre-'86 tank has tabs at the back where it attaches to the frame. And later model tanks (K11) have downward facing mounts. Try placing the VIN in your signature for easy answers to your queries. As for what type of barbed fitting was used, got any pictures? It might just be easy to replicate that.


__________________________________________________

1970 R60/5, OZ '77 R75/7-R100, '85 K100'87 K75C, OZ '87 K100RS, '93 K11-K12 Big Block, '93 K1100RS, '95 R100-Mystic, '96 K1100RS, '98 K1200RS, '00 K1200RS, '02 K1200RS, '03 K1200GT, '04 R1150R'04 R1150RT, '05 K1200S, '06 K1200R, '07 K1200R, '09 K1300GT & 2013 R1200RT-P  - Beemers owned still or sold.

~We all believe what we want to believe in - Rob Dickinson
    

3Back to top Go down   Help! Broken fuel tank barb Empty Re: Help! Broken fuel tank barb Wed Nov 12, 2014 3:28 am

KJustin

KJustin
Silver member
Silver member
My apologies.  New to the forum, still getting the hang of things.  My bike is a 1985 K100RT.  The VIN sticker is a bit worn, can't make out all of the numbers.  Embarrassingly, I don't know where the VIN on the engine is.  Will see if I can figure out how post a picture in a bit.

    

4Back to top Go down   Help! Broken fuel tank barb Empty Re: Help! Broken fuel tank barb Wed Nov 12, 2014 3:46 am

Two Wheels Better

Two Wheels Better
Moderator
Moderator
'85 K100 tanks on eBay are cheap and plentiful, if you need to go that direction. Perhaps it's an easy fix.


__________________________________________________

1970 R60/5, OZ '77 R75/7-R100, '85 K100'87 K75C, OZ '87 K100RS, '93 K11-K12 Big Block, '93 K1100RS, '95 R100-Mystic, '96 K1100RS, '98 K1200RS, '00 K1200RS, '02 K1200RS, '03 K1200GT, '04 R1150R'04 R1150RT, '05 K1200S, '06 K1200R, '07 K1200R, '09 K1300GT & 2013 R1200RT-P  - Beemers owned still or sold.

~We all believe what we want to believe in - Rob Dickinson
    

5Back to top Go down   Help! Broken fuel tank barb Empty Re: Help! Broken fuel tank barb Wed Nov 12, 2014 5:26 am

92KK 84WW Olaf

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Life time member
Life time member
Did the change to the fuel tank happen in 85?


Maybe this might help: where is the power supply to the fuel tank connected, is it at the front left of the tank or at the rear on the right?

The engine number is on the side, when you look at the oil sight glass , to the left where it meets the clutch housing there is a flat strip that's vertical and it is stamped on that.

Above the brake pedal, on the frame, you will see some numbers stamped on the frame. The last 5 or 6 digits are what you need. For example on mine the last digits are 22575 which the records show as being K100RT. There is a database of these numbers here.

Best of luck with it too.


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 37,190 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 42,640 miles.

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

6Back to top Go down   Help! Broken fuel tank barb Empty Re: Help! Broken fuel tank barb Wed Nov 12, 2014 7:40 am

KJustin

KJustin
Silver member
Silver member
Fuel power supply is at the front and it attaches with one bolt in the middle of the tank a the back; I think this is the old style of tank. Thanks for the info on the VIN locations.  I'll look tomorrow and update my footer to include that info.

In the meantime, I tried to reattach the barb with JB Weld.  I saw that a lot of other people have used it with success to fix tank leaks.  I figured that this is is just a colossally bad tank leak.  I'm letting it cure overnight before trying it out.  I was also thinking about coating that repair with fiberglass, heavy on the resin.  I thought that might plug up any pinholes or voids in the JB Weld.  I'm open to comments/warnings/advice on this fix.

    

7Back to top Go down   Help! Broken fuel tank barb Empty Re: Help! Broken fuel tank barb Wed Nov 12, 2014 10:44 am

Crazy Frog

Crazy Frog
admin
admin
Is that the pressure or the return line that you try to fix (front or back line)?


__________________________________________________
Help! Broken fuel tank barb Frog15Help! Broken fuel tank barb Logo2101986 k75, 1985 K100rt, 1985 K100rt/EML GT2 sidecar, 1999 K1200lt/Hannigan Astro Sport sidecar.
    

8Back to top Go down   Help! Broken fuel tank barb Empty Re: Help! Broken fuel tank barb Wed Nov 12, 2014 11:14 am

Inge K.

Inge K.
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@Crazy Frog wrote:Is that the pressure or the return line that you try to fix (front or back line)?


I would guess that it's the pressure line, as it's mentioned that the other one
is a bolt on version.......which obviously is the return check valve.

Could be a very exciting project this......have the fire extinguisher ready.


__________________________________________________
Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

9Back to top Go down   Help! Broken fuel tank barb Empty Re: Help! Broken fuel tank barb Wed Nov 12, 2014 3:53 pm

Two Wheels Better

Two Wheels Better
Moderator
Moderator
@92KK 84WW Olaf wrote:Did the change to the fuel tank happen in 85?
'85 and earlier tanks have a bracket across the back end which protrudes a bit - the earlier frame is different as well. '86 and later tanks have only the two downward-facing points which set into the rubber grommets with C-clips, then the K11 tank is different again.

I was searching for an appropriate frame for my project and settled on an '89 and tank from a K11.


__________________________________________________

1970 R60/5, OZ '77 R75/7-R100, '85 K100'87 K75C, OZ '87 K100RS, '93 K11-K12 Big Block, '93 K1100RS, '95 R100-Mystic, '96 K1100RS, '98 K1200RS, '00 K1200RS, '02 K1200RS, '03 K1200GT, '04 R1150R'04 R1150RT, '05 K1200S, '06 K1200R, '07 K1200R, '09 K1300GT & 2013 R1200RT-P  - Beemers owned still or sold.

~We all believe what we want to believe in - Rob Dickinson
    

10Back to top Go down   Help! Broken fuel tank barb Empty Re: Help! Broken fuel tank barb Wed Nov 12, 2014 4:26 pm

92KK 84WW Olaf

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Life time member
Life time member
My RT has the earlier tank, being 08/84, but I had an idea the change happened before end of 84. Mine is held down by the single bolt at the rear of the tank. The LT has the clip arrangement and they two tanks are not interchangeable.

I just couldn't remember when the tank was changed.


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 37,190 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 42,640 miles.

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

11Back to top Go down   Help! Broken fuel tank barb Empty Re: Help! Broken fuel tank barb Wed Nov 12, 2014 4:29 pm

KJustin

KJustin
Silver member
Silver member
I think Inge is right about it being the pressure line (unfortunately). I'm going to borrow a fire extinguisher from work and have it on hand, just in case. Even if my fix works, I think I'm going to probably get a new tank anyway. I'm not sure that I want to be worrying about this every time I ride. Afterall, a main purpose of riding (for me) is to forget my worries for a moment....

And Two Wheels is correct about the tank configuration. My 85 has the bar across the back and attaches with one bolt. The electronics connection is at the front, between the fuel line connections.

    

12Back to top Go down   Help! Broken fuel tank barb Empty Re: Help! Broken fuel tank barb Wed Nov 12, 2014 4:47 pm

92KK 84WW Olaf

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Life time member
Life time member
I would not be afraid of having it repaired. I had my tank off and found it had been repaired and welded. A new piece welded in with a new spigot on it and it can work fine. If you have the tank drained and stripped and devapourised its not so difficult to do, just wrap it in flame retardant cloth for protection. There is a risk of pinhole leaks and if the tank is good its worth keeping it. A replacement can bring problems too. On an RT/LT the fairing conceals the bottom of the tank so you may well avoid respraying it!!


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 37,190 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 42,640 miles.

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

13Back to top Go down   Help! Broken fuel tank barb Empty Re: Help! Broken fuel tank barb Thu Nov 13, 2014 4:33 am

KJustin

KJustin
Silver member
Silver member
For those in suspense about my JB Weld repair, I was successful.  I ended up doing JB Weld for the main repair and then coated the whole area, extending beyond the JB Weld with 5 minute epoxy.  The bike started and ran beautifully.  I let it run for about 10 minutes and there was no hint of any problem.  Unfortunately I couldn't road test is as I have a bunch of other things pulled apart.  

And, Inge, thanks for reminding me to be safe about this sort of stuff.  I did in fact take the bike out of my garage, away from the house, and had a fire extinguisher and a charged hose in hand, just in case.

Probably it would be wise for me to make a real (welded) repair or get a new tank.  If anyone reading this thread has an 85 K100 tank they are looking to sell, let me know.  Otherwise I'll have to start looking for someone who can make this sort of precision weld.

    

14Back to top Go down   Help! Broken fuel tank barb Empty Re: Help! Broken fuel tank barb Thu Nov 13, 2014 5:00 am

Two Wheels Better

Two Wheels Better
Moderator
Moderator


__________________________________________________

1970 R60/5, OZ '77 R75/7-R100, '85 K100'87 K75C, OZ '87 K100RS, '93 K11-K12 Big Block, '93 K1100RS, '95 R100-Mystic, '96 K1100RS, '98 K1200RS, '00 K1200RS, '02 K1200RS, '03 K1200GT, '04 R1150R'04 R1150RT, '05 K1200S, '06 K1200R, '07 K1200R, '09 K1300GT & 2013 R1200RT-P  - Beemers owned still or sold.

~We all believe what we want to believe in - Rob Dickinson
    

15Back to top Go down   Help! Broken fuel tank barb Empty Re: Help! Broken fuel tank barb Tue Nov 18, 2014 12:29 pm

tgolden

tgolden
Silver member
Silver member
Alumiweld welding rods:

http://www.alumiweld.com/

See the videos I posted on the thread below.

https://www.k100-forum.com/t8796-fuel-tank-cleaning

It's an easy repair. You can use a MAPP gas torch. You need to be cautious when welding a gas tank.

The tank needs to be thoroughly cleaned to prevent an explosion.


Also see Alumaloy:

http://www.alumaloy.com/


__________________________________________________
1985 K100RS USA Model WB1051300F0042533 - Original Owner
Delivery: 04/85 - Motorradhaus Ebert, Höchberg, Deutschland
    

16Back to top Go down   Help! Broken fuel tank barb Empty Re: Help! Broken fuel tank barb Sat Dec 06, 2014 5:07 pm

KJustin

KJustin
Silver member
Silver member
Thanks all for the replies and thoughts.  I bit the bullet and bought a new (used) tank, though I'll probably try to do he alumiweld repair on the broken one to have a spare, or maybe sell if the repair looks good enough.

New question now:  are there any quick release solutions for the fuel line so that I can install the hose on that aluminum barb and not have to mess with it again?  Or is there something I should coat the barb with before installing the line to make it easier to remove (though I am worried about fouling the injectors with foreign matter)? I've found it quite difficult to get the hose on and off that barb and would like to avoid breaking the barb on the new tank.

My apologies in advance if this is a silly noob question.


__________________________________________________
1985 K100 Cafe Racer (formerly an RT), VIN 0051736
    

17Back to top Go down   Help! Broken fuel tank barb Empty Re: Help! Broken fuel tank barb Sat Dec 06, 2014 5:32 pm

Inge K.

Inge K.
VIP
VIP
A quick release coupling is used on later models:
Male, BMW part # 13 53 7 700 800.
Female, BMW part # 13 31 7 659 120.


__________________________________________________
Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

GTJos

GTJos
Silver member
Silver member
@Inge K. wrote:A quick release coupling is used on later models:
Male, BMW part # 13 53 7 700 800.
Female, BMW part # 13 31 7 659 120.
 Hi ! Just logged in and read this post; I use the quick release coupling from an online shop: Louis.de
Very happy with them, fine quality... (Not cheap, though...)
I think they ship worldwide; just to be sure you'd have to ask...

Look in here:
Material 'celeron acetal' (pressure max 10BAR), the ones I use:

https://www.louis.de/en/artikel/schnellverschlusskupplung-schwarz-anschluss-8-mm/10007932?list=32048435

In brass also:
https://www.louis.de/en/artikel/quick-release-coupling-brass-8-mm-connection/10007930?list=32048937

(Either way, you'd need 2 sets of them...)

I can say it's a joy to build of my tank; 2 clicks and I'm 'ready for take off'. No more fidling around with those hoseclamps... Very Happy

Enjoy !


__________________________________________________
Help! Broken fuel tank barb Deutch10Ich bin enge Kirchröatsjer jong; adieë wa ?! Help! Broken fuel tank barb Deutch10
                                1992  K1100LT 6458188
                                1987 K100LT (RS-fairing) 0170844 + sidecar EML GT2001
                                1986 K100RS 0085647 + sidecar Velorex 562
                                1985  K100RT  0027026
    

19Back to top Go down   Help! Broken fuel tank barb Empty Re: Help! Broken fuel tank barb Sat Dec 06, 2014 9:49 pm

sidecar paul

sidecar paul
Life time member
Life time member
This is how I did mine, but beware of the plastic connectors, I had to replace mine with brass ones after a failure.

https://www.k100-forum.com/t3308-fuel-line-connectors  

Paul.


__________________________________________________
'84 K100RS (0014643) (owned since '85), 86 K100RS (0018891) with Martello sidecar (built as an outfit in '88),
'51 Vincent (since '67),'72 Montesa Cota (from new), '87 Honda RS125R NF4 (bought 2015) 
....No CARS never ever!
    

20Back to top Go down   Help! Broken fuel tank barb Empty Help! Broken fuel tank barb Sat Dec 06, 2014 10:10 pm

RT

RT
Life time member
Life time member
Might not help, but I found a pair of special pliers called hose removal pliers, down at the local Auto store. They have a funny end that grips the hose and slips between the hose and metal stub and when you squeeze the pliers
they force the hose off with no twisting. I also put quick release joiners in, just rem,ember to do them up properly. What a Face


__________________________________________________
2011 R1200RT
    

21Back to top Go down   Help! Broken fuel tank barb Empty Re: Help! Broken fuel tank barb Sat Dec 06, 2014 11:10 pm

Inge K.

Inge K.
VIP
VIP
Like this?:


Help! Broken fuel tank barb Slange10
Help! Broken fuel tank barb Slange11


__________________________________________________
Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

22Back to top Go down   Help! Broken fuel tank barb Empty Help! Broken fuel tank barb Sun Dec 07, 2014 9:01 pm

RT

RT
Life time member
Life time member
That's the one Inge, you always seem to have a charged up camera at hand. Well done. (I own the worlds oldest
most simple phone without camera or internet. Must be an old dude.)


__________________________________________________
2011 R1200RT
    

23Back to top Go down   Help! Broken fuel tank barb Empty Re: Help! Broken fuel tank barb Sun Dec 07, 2014 9:33 pm

Inge K.

Inge K.
VIP
VIP
Don't feel so sad RT.................haven't internet on mine either.


Help! Broken fuel tank barb Ernema10


__________________________________________________
Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

24Back to top Go down   Help! Broken fuel tank barb Empty Re: Help! Broken fuel tank barb Sun Dec 07, 2014 9:45 pm

indian036

indian036
Life time member
Life time member
@Inge K. wrote:Don't feel so sad RT.................haven't internet on mine either.


Help! Broken fuel tank barb Ernema10
Send it over to me. I'm sure I can get it on-line for you without too much problem!
Bill


__________________________________________________
1985 K100RT  VIN 0028991  My original Very Happy   (Historic rego)
1985 K100RT  VIN 0029036  BOB the Blue Old Bike  (Historic rego)
1990 K100LT  VIN 0190452  Work in progress
1984 K100RT  VIN 0023022  Work needing lots of progress

1986 K100RT  VIN 0090542  Work needing lots and lots of progress
1993 K1100LT  VIN 0183046  Work in progress
1993 K75S  VIN 0213045  Newest toy, slightly non-original
    

25Back to top Go down   Help! Broken fuel tank barb Empty Re: Help! Broken fuel tank barb Sun Dec 07, 2014 9:56 pm

Inge K.

Inge K.
VIP
VIP
Imposibble......it haven't any RJ45 connector.


__________________________________________________
Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

26Back to top Go down   Help! Broken fuel tank barb Empty Re: Help! Broken fuel tank barb Sun Dec 07, 2014 9:59 pm

indian036

indian036
Life time member
Life time member
@Inge K. wrote:Imposibble......it haven't any RJ45 connector.
I was going to install a DB9!

(USB would be too modern for this camera.)


__________________________________________________
1985 K100RT  VIN 0028991  My original Very Happy   (Historic rego)
1985 K100RT  VIN 0029036  BOB the Blue Old Bike  (Historic rego)
1990 K100LT  VIN 0190452  Work in progress
1984 K100RT  VIN 0023022  Work needing lots of progress

1986 K100RT  VIN 0090542  Work needing lots and lots of progress
1993 K1100LT  VIN 0183046  Work in progress
1993 K75S  VIN 0213045  Newest toy, slightly non-original
    

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