Page 1 of 2 1 2 LastLast
Results 1 to 15 of 27

Thread: Fuel strip to float conversion for 07RT

  1. #1
    Back in the saddle again mikegalbicka's Avatar
    Join Date
    Aug 2014
    Location
    Lakeland,FL
    Posts
    1,767

    Fuel strip to float conversion for 07RT

    I am in the process of writing up this conversion as I install it for your future reference. I am dealing with someone in the Netherlands and sometimes things get lost in translation. I have successfully removed the fuel pump, fuel strip and filler cap and have a few questions for you experienced wrenches which I will post below. Thanks for any insight you can provide as I start to button this back up.

    https://www.proebeemer.nl/

  2. #2
    Back in the saddle again mikegalbicka's Avatar
    Join Date
    Aug 2014
    Location
    Lakeland,FL
    Posts
    1,767

    Fuel vent/overflow hose

    There is a two foot long 3/16Ē fuel hose running horizontally in the gas tank between the fuel filler cap and bottom of fuel pump flange attached with crimped on clamps. A vent pipe comes out of the top of the fuel pump and a hose is connected that runs under the seat and then down by the kickstand and just hangs there. I assume this hose is to allow any overflow gas to escape and/or any excess pressure in the tank. I need to lengthen it to about four feet so it wonít interfere with the operation of the float. It would run straight down from the fuel pump to the bottom of the tank then across the bottom and up the left side of the tank and up to the filler cap.

    Will this reconfiguration cause any problem with the purpose of this hose?

    BMW crimped clamps in the micro fiche require a special tool of course but they also call out a removable screw on clamp as a possible replacement. Would it be OK to visit my local parts store and just use their screw on fuel hose clamp? I assume there isnít much pressure present.

    I may also use a zip tie around the body of the fuel pump to hold this hose in place so it canít easily shift around during reassembly.

    Any glaring problems here this shade tree mechanic is missing?

  3. #3
    Back in the saddle again mikegalbicka's Avatar
    Join Date
    Aug 2014
    Location
    Lakeland,FL
    Posts
    1,767

    Relay for controller

    A customized electronic controller is installed inline between the fuel pump float and on board computer display to convert the float readings and display the fuel level properly. It draws only 20mA. He suggests using the accessory socket wires in the left fairing near the fuel pump as a relay trigger and provide 12v directly from the battery through the relay when triggered to the controller. He feels a relay is necessary due to the low draw of the controller.

    Is a relay really necessary? I am tempted to wire it direct to a canbus circuit like the unused GPS harness provided.

    If a relay is needed I am having trouble finding a proper one. Most seem to be 20, 30 or 40 amp which is all overkill. He suggested one used for a GPS. Any suggestions?

    If a relay is used should there be an inline fuse between the battery and relay and if so what size?
    Last edited by mikegalbicka; 09-14-2020 at 01:24 AM.

  4. #4
    Back in the saddle again mikegalbicka's Avatar
    Join Date
    Aug 2014
    Location
    Lakeland,FL
    Posts
    1,767
    Any experienced hexhead wrenches out there who could weigh in on my questions above so I can get this project completed?

  5. #5
    Registered User drneo66's Avatar
    Join Date
    Jun 2009
    Location
    Rochester, MN
    Posts
    673
    What a great project! I'm betting you will have quite the demand if this all comes together! I have been following the progress on the ProBeemer site, but as you said, there's a lot lost in translation.

    My basic (not an engineer, nor do I play one on TV) thoughts: I would imagine that extending that vent line should not be a problem. As you said, there isn't any/minimal pressure, and I wouldn't imagine that the bike will care. Obviously using the correct type of line is the most important.

    On the screw clamp - again, there isn't any pressure in the line, so you should be okay. As I understand it, the oetiker clamp is preferred because they create an even pressure all around the hose vs. screw types that could vary in pressure? However, many other bikes (Kbikes I know for sure) use the screw-type clamps.


    I'd try a posi-tap into either the left hand side auxiliary outlet or GPS wiring harness. I've used one for a voltmeter install (most likely similar voltage draw as the controller board) without problems. Plus it will be nice to have a switched power source.

    (Using a relay would still force you to tap into switched power somewhere on the bike anyway. The relay rating is for maximum amps, so it doesn't matter that much. Then you'd also want to have a fuse for the positive-side of the relay, and I suggest a 0.5 amp or 1.0 amp inline glass fuse. Why do all that work if you can just rely on the magic of the CANBUS?)
    Current: 2007 BMW R1200RT, 2013 F800GS
    Former: 1995 BMW K75S, 2009 BMW G650GS
    MOA Member #:150400, IBA#: 37558

  6. #6
    Ponch ponch1's Avatar
    Join Date
    Dec 2010
    Location
    Fountain Hills AZ
    Posts
    1,367
    You should post on BMW Sport Touring Forum in the hex head section. Dirt Rider could answer all your questions.
    My Motorrad
    BMWMOA 162849 | BMWRA 41335 | VROC 8109-R | VBA 19

  7. #7
    Back in the saddle again mikegalbicka's Avatar
    Join Date
    Aug 2014
    Location
    Lakeland,FL
    Posts
    1,767
    Drneo66 - thanks for weighing in. I feel the same way as you on all of this. Based on his comments I wasnít sure if perhaps the low draw of the controller wasnít enough to energize the canbus circuit but I donít know why else he would suggest the relay.

    Ponch1 - thanks for the suggestion, will check it out

  8. #8
    Registered User drneo66's Avatar
    Join Date
    Jun 2009
    Location
    Rochester, MN
    Posts
    673
    Quote Originally Posted by mikegalbicka View Post
    Drneo66 - thanks for weighing in. I feel the same way as you on all of this. Based on his comments I wasnít sure if perhaps the low draw of the controller wasnít enough to energize the canbus circuit but I donít know why else he would suggest the relay.
    Anecdotal evidence, the little light on my USB charger (no actual load) will light up when plugged in - that tells me ~15ma load will still energize the port. I hope your taking good notes and are going to a write up?
    Current: 2007 BMW R1200RT, 2013 F800GS
    Former: 1995 BMW K75S, 2009 BMW G650GS
    MOA Member #:150400, IBA#: 37558

  9. #9
    Registered User langoptc's Avatar
    Join Date
    Aug 2020
    Location
    Peachtree City, GA
    Posts
    40
    Looking forward to your progress. Recently bought a 2009RT and debating doing this proactively. Good luck!
    Mama always told me not to look into the eyes of the sun...but Mama, that's where the fun is!

    2009 R1200RT Sand Beige Metallic (aka Champipple), 2007 Honda VFR RWB

  10. #10
    Back in the saddle again mikegalbicka's Avatar
    Join Date
    Aug 2014
    Location
    Lakeland,FL
    Posts
    1,767
    Waiting for a shipment from MaxBMW so I can finish up. Then if all goes well will put together a how to.

  11. #11
    Registered User lkchris's Avatar
    Join Date
    Mar 2003
    Location
    Albuquerque, NM
    Posts
    6,429
    Do you suppose BMW designed the float sender to send the same messages to the CAN bus as the strip did?

    The float sender bikes of course also had different gauge clusters.
    Kent Christensen
    21482
    '12 R1200RT, '02 R1100S

  12. #12
    Back in the saddle again mikegalbicka's Avatar
    Join Date
    Aug 2014
    Location
    Lakeland,FL
    Posts
    1,767

    vent hose and clamp

    I wanted to use the removable vent hose clamp alternative for ease of use so I ordered it as specified but based on the specs I saw I feared it might be too big. After receiving everything and inspecting the fit I still feel that way. What do you think?

    Screenshot_2020-09-29 MAX BMW Motorcycles - BMW Parts Technical Diagrams - R1200RT 05-09 (K26).png

  13. #13
    Back in the saddle again mikegalbicka's Avatar
    Join Date
    Aug 2014
    Location
    Lakeland,FL
    Posts
    1,767

    hose

    the hose has an OD of 10 mm

    vent hose.jpg

  14. #14
    Back in the saddle again mikegalbicka's Avatar
    Join Date
    Aug 2014
    Location
    Lakeland,FL
    Posts
    1,767

    crimp clamp

    this clamp is about the same

    crimp clamp.jpg

  15. #15
    Back in the saddle again mikegalbicka's Avatar
    Join Date
    Aug 2014
    Location
    Lakeland,FL
    Posts
    1,767

    screw clamp

    this optional clamp is bigger at 12 to 13.5 mm spec

    screw clamp.jpg

Similar Threads

  1. K1200 fuel strip swap to K1300 float
    By zoomie in forum Wedge K-bikes
    Replies: 4
    Last Post: 09-04-2020, 04:06 AM
  2. strip vs float
    By 181512 in forum Hexheads/Camheads
    Replies: 2
    Last Post: 10-16-2016, 04:56 PM
  3. Fuel pump failure '07RT 106000kms
    By 31310 in forum Hexheads/Camheads
    Replies: 12
    Last Post: 04-24-2014, 12:17 AM
  4. Float or strip on 2013 and 2014 R1200R?
    By JayElDee in forum Hexheads/Camheads
    Replies: 4
    Last Post: 10-09-2013, 06:49 PM
  5. replace fuel strip by float on 2005 R1200rt
    By tranzeat in forum Hexheads/Camheads
    Replies: 5
    Last Post: 07-03-2013, 02:27 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •