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Author Topic: K100rs fuel pump  (Read 10611 times)

Offline grant71

  • ^ Proficient Motobricker
  • Posts: 144
K100rs fuel pump
« on: April 15, 2013, 07:52:34 AM »
I have been searching high and low in Cape town for submersible  fuel hose. No luck. However this am i called a fuel injection specialist and explained my problem. Come over said Eric . When i arrived Eric took me thru the workshop ( lots of Porsches ) to the scrap drum. Here he said this will do and handed me 2 injection contraptions. How much ? No no you can have them. They are broken. Remember i only want the hoses. Well let me tell you good old boys that the fuel pump works and is almost the size of my k100.  Free pump and hoses. Made my day. If any of you people need a pump ill approach Eric. I suppose all you will have to pay is the shipping.
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I Live In Cape Town South Africa.  I Ride A 1986 K100RS.

Offline JamesInCA

  • ^ Proficient Motobricker
  • Posts: 133
Re: K100rs fuel pump
« Reply #1 on: April 15, 2013, 05:49:50 PM »
The pump manufacturer and part # might be of interest, if it is a potential substitute.
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Offline johnny

  • TrailBrakingThrottleWhacker
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  • Whacking...n...Chopping Sliding...n...High Siding
Re: K100rs fuel pump
« Reply #2 on: April 15, 2013, 06:41:21 PM »
greetings grant71...

im interested... how much for one of those junk fuel pumps shipped to california zip 90210...

j o
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  • :johnny i parks my 96 eleven hundert rs motobrick in dodge county cheezconsin  :johnny

Offline grant71

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  • Posts: 144
Re: K100rs fuel pump
« Reply #3 on: April 16, 2013, 03:02:12 AM »
Dont know but ill take pump to post office  and they ll tell me. An after thought : why not visit a fuel injection workshop in your area and chat to the main man. You ll save shipping costs. If main man is a bit stingy tell him how generous South Africans are. He he
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I Live In Cape Town South Africa.  I Ride A 1986 K100RS.

Offline grant71

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Re: K100rs fuel pump
« Reply #4 on: April 16, 2013, 05:07:49 AM »
No man markings. Pump is 6 in long and 2 in diam. From diesel engine
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I Live In Cape Town South Africa.  I Ride A 1986 K100RS.

Offline Lawrence

  • ^ Proficient Motobricker
  • Posts: 301
Re: K100rs fuel pump
« Reply #5 on: April 16, 2013, 01:23:56 PM »
It would be far more economical to simply buy a new fuel pump as fitted to some Fords.  That would no doubt be cheaper than paying international freight these days.   :2thumbup:
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1985 K100RS

1982 Laverda Mirage 1200TS
1983 BMW R100RS

Offline enb54

  • ^ Proficient Motobricker
  • Posts: 156
Re: K100rs fuel pump
« Reply #6 on: April 16, 2013, 02:29:09 PM »
Hi all... Go to this link and maybe you'll get lucky with K75/100 fuel pump info... http://www.motobrick.com/index.php/topic,2058.msg14989.html#msg14989 . Hope this helps a bit...
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  • Red Deer, AB
Eric

Then-1966 Suzuki X6 Hustler, 1987 BMW K100RS, 1997 Suzuki GSF600 Bandit, 1991 BMW K75 RT
Now-1974 Honda CB125S, 2015 Honda Grom (MSX125)

Offline mjydrafter

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  • Posts: 174
Re: K100rs fuel pump
« Reply #7 on: April 16, 2013, 05:30:06 PM »
My $18 ebay pump is doing fine.  Ebay search "fuel pump 2042".  $18.99 shipped.

The damper replacement I did from the thread enb54 posted is still working as well.

I may have to see if I can make up some kits, if there is some interest.  I would have to check but the damper I did probably cost <$5 w/the zip ties I used to secure the strainer.  About the only piece you need to reuse is the plastic lock ring that holds the FP in place in the tank.

For $18 a guy could even carry a spare.  (a side benefit of the smaller pump, would be small space, heck I bet it would fit just fine in the tool box)   
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1986 BMW K75c
1974 Suzuki TC-185 (the little 10 speed)

Offline beemrdon

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Re: K100rs fuel pump
« Reply #8 on: March 10, 2016, 08:01:03 PM »
Just bought one of these........................................

http://www.ebay.com/itm/331387290009?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT .......................... :deal:
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  • The South West... best motorcycling in the US! Longest riding season = 12 months per year
  • 1996 K1100 LT SE, Aspen Silver - Now with 159,xxx miles.

Offline alexis291

  • ^ Proficient Motobricker
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Re: K100rs fuel pump
« Reply #9 on: March 11, 2016, 03:47:01 AM »
Have you tried it yet?
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  • UK
  • K1100RS 1995

Offline beemrdon

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Re: K100rs fuel pump
« Reply #10 on: March 11, 2016, 08:50:00 AM »
Not yet. I just ordered it  and should be here in a week.
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  • The South West... best motorcycling in the US! Longest riding season = 12 months per year
  • 1996 K1100 LT SE, Aspen Silver - Now with 159,xxx miles.

Offline The Mighty Gryphon

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Re: K100rs fuel pump
« Reply #11 on: March 11, 2016, 09:02:42 AM »
I just bought one of those as well.  It is pretty skinny so it will have to be shimmed to work in the original mount.  Mainly, I carry it on the theory that I won't really ever have to use it based on the fact that nothing ever breaks if you have the spare with you.
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  • In my garage in Marilla, NY
  • '91K100RS White/Blue
Current:
'91 K100RS16V "Moby Brick Too"

Past:
'94 K75RT "Ilsa, She Wolf of the SS"
'92 K100RS16V "Moby Brick" (RIP, deceased in a vehicular assault)
'94 K75S Special Edition Dakar Yellow "Cheetos"
'89 K100RS Special Edition "Special Ed"

Offline beemrdon

  • ^ Proficient Motobricker
  • Posts: 470
Re: K100rs fuel pump
« Reply #12 on: March 11, 2016, 10:02:43 AM »
I agree. I think it's called Murphy's Law. For example, I installed 4 snow tires on my Volvo in December insuring a virtually snow-free winter in Massachusetts...... I'll take it though.
As far as shimming goes, I have heard that you can add fuel hose in there, inside the holder, around the new pump to take up the slack ( or basically anything that won't deteriorate from gas immersion). I have also seen a set up where you get a dead OEM pump and cut off the top and gut the inside. Then, put the little one in there with a gas proof foam surround, or whatever,  - between the pump and the inside of the OEM body.
Since the connectors are different on the two pumps, I will make up 2 short pieces of wire with spade connectors. Then, if I have a FP failure on the road, I can just twist the bare end of the wires to the OE ends (temporary measure) and be on my way.
Any better ideas on the connectors would be appreciated.
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  • The South West... best motorcycling in the US! Longest riding season = 12 months per year
  • 1996 K1100 LT SE, Aspen Silver - Now with 159,xxx miles.

Offline Martin

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  • Posts: 4475
Re: K100rs fuel pump
« Reply #13 on: March 11, 2016, 04:23:53 PM »
Gryph what do you intend to shim the pump with that is both petrol and alcohol proof. I have been pondering that problem, but it is now not as urgent, as I believe the inclusion of alcohol in all our grades of fuel has been put  on the backburner. :clap:
Regards a perplexed Martin.
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  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

Offline The Mighty Gryphon

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Re: K100rs fuel pump
« Reply #14 on: March 11, 2016, 06:01:07 PM »
Yikes!!! Wrapping bare wires in the gas tank?!  You are asking for an explosion.   Just cut the wires close to the pump and crimp on some spade connectors, put them back together and reconnect to the OEM pump.  The you are ready to change the pump when the old one shit's the bed.  It's a half hour job.

Martin, I plan on using some of that pipe insulation that is made of polyethylene foam. 
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  • In my garage in Marilla, NY
  • '91K100RS White/Blue
Current:
'91 K100RS16V "Moby Brick Too"

Past:
'94 K75RT "Ilsa, She Wolf of the SS"
'92 K100RS16V "Moby Brick" (RIP, deceased in a vehicular assault)
'94 K75S Special Edition Dakar Yellow "Cheetos"
'89 K100RS Special Edition "Special Ed"

Offline beemrdon

  • ^ Proficient Motobricker
  • Posts: 470
Re: K100rs fuel pump
« Reply #15 on: March 11, 2016, 06:23:22 PM »
I'm not getting what you are suggesting. If I put the spade connectors on the wires, how do I reconnect to the OEM pump? Thanks.
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  • The South West... best motorcycling in the US! Longest riding season = 12 months per year
  • 1996 K1100 LT SE, Aspen Silver - Now with 159,xxx miles.

Offline gazman

  • ^ Motobrick Curious
  • Posts: 105
Re: K100rs fuel pump
« Reply #16 on: March 12, 2016, 03:34:37 AM »
I keep a spare pump in the tail that's smaller than the one in the tank and has different connectors. I've made up small jump leads [1in] that   are connected to spare with male spade ends so if I need it it's plug an play. There's also a foot of fuel line [ cut a bit off use it to wedge smaller pump]
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  • west australia
  • 93 K1100LT

Offline The Mighty Gryphon

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Re: K100rs fuel pump
« Reply #17 on: March 12, 2016, 11:42:22 PM »
Beemerdon, Cut the wire about an inch or so from the ring terminal.  On the short piece of wire with the ring terminal crimp on a MALE spade connector.  On the wire in the tank crimp on a female spade.

Join the two spade connectors and you can reconnect the ring to the fuel pump.  If you ever have to replace the original pump with a cheaper one that has spade terminals, you just have to disconnect the male and female spade connectors.  Ditch the short wire with the ring terminal on the end and connect the female spade connector to the pump's male terminal.

If you like, I can make one up and take a picture.  I know my explanations are often kinda hard to follow.
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  • In my garage in Marilla, NY
  • '91K100RS White/Blue
Current:
'91 K100RS16V "Moby Brick Too"

Past:
'94 K75RT "Ilsa, She Wolf of the SS"
'92 K100RS16V "Moby Brick" (RIP, deceased in a vehicular assault)
'94 K75S Special Edition Dakar Yellow "Cheetos"
'89 K100RS Special Edition "Special Ed"

Offline beemrdon

  • ^ Proficient Motobricker
  • Posts: 470
Re: K100rs fuel pump
« Reply #18 on: March 13, 2016, 09:50:28 AM »
Thanks Jim, I think I've got it now.
I took the OEM fuel pump out of the bike couple of days ago and noticed that the pre-filter sock was ripped along the seam and was not attached to the pump. I may have knocked it off taking it out. I have x-large hands so I was doing it "blind". I fixed it temporarily by heating the seam area with a soldering iron to stick the two sides together (yes, away from the gas tank), it is made of a plastic mesh.
BTW, my 1996 K1100 has the later 43 mm pump, a VDO, not the older version 52 mm Bosch(?). I think they changed over in 1993.
Anyway, my pump has a "sock", not a cup at the bottom as a pre-filter. I priced these socks online and BMW dealers want $58. for a new one. The cheapest one I found is through an online European auto parts co for $42.00...that's outrageous. If I can find a pre for another application that fits the VDO, I will pass it along or if anyone reading this can cross reference one....
Also, the pre-filter that I took out was black, brittle and somewhat hard to blow through. They are bright green when new. I would suggest that you folks that have this set-up check your pre-filter socks for integrity. Dirt and crap going through the fuel pump will shorten it's life.

This may be a stupid question but I'm going to ask it anyway...Does anyone know if an in-line fuel pump can be submerged in gas- and used as an in-tank pump?
My new EL-Cheapo fuel pump should be arriving from (gulp) China by next Friday. Maybe the sock from that will fit.
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  • The South West... best motorcycling in the US! Longest riding season = 12 months per year
  • 1996 K1100 LT SE, Aspen Silver - Now with 159,xxx miles.

Offline beemrdon

  • ^ Proficient Motobricker
  • Posts: 470
Re: K100rs fuel pump
« Reply #19 on: March 21, 2016, 08:17:41 PM »
I found an exact match!

In case you didn't see this...http://www.motobrick.com/index.php/topic,8040.0.html
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  • The South West... best motorcycling in the US! Longest riding season = 12 months per year
  • 1996 K1100 LT SE, Aspen Silver - Now with 159,xxx miles.
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