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Thread: 2005 F650GS wonít start

  1. #1

    2005 F650GS wonít start

    Good morning. I have an 05 F650GS single with just over 41K that had been sitting for a month or so (on a battery tender) and wonít start. Hoping for some guidance or help with diagnosing the problem. Battery is strong. Bike turns over but simply wonít fire. Bike has fresh fuel, has a spark. So far, I have checked the fuel pump and it is pushing fuel to the line. If I spray a bit of carb cleaner into the throttle body via the air intake, the bike fires right up and runs perfectly fine. Took it for a quick test ride and no issues running or idling. Turn it off, try to start it again and same problem - turns over but wonít fire up. I pulled the injector and cleaned it. In doing so, I also tested it to see if it is spraying any fuel when I turn the key and kill switch to on but nothing. So, thinking that the injector may be the problem but then again, seems unlikely since the bike runs just fine once it starts (with a shot of carb cleaner to get it going). Any help or suggestions would be very much appreciated. Thanks!

  2. #2
    Liaison 20774's Avatar
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    A couple of threads on an '09 model on not starting in the Similar Threads pane below. Might be worth checking out.
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  3. #3
    I have never worked this problem but offer the following:

    Normally with FI, the fuel pump runs anytime the engine is running.
    It also runs a few seconds on key on to pressurize the system, but then shuts off for reasons unknown to me.

    My guess is there is a relay that activates the fuel pump on key on, but then times out.
    Maybe your bike has a bad relay?

    Hopefully someone with more detailed knowledge can chime in.
    -Live as fully as you can as long as you can-

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    My thoughts for dcattafesta bike is the injectors are plugged up. Use some injector cleaner to remove the varnish on the inside. Also check what OldCamper said too, perhaps a relay.
    Let us know how it comes out.

  5. #5
    The fuel pump can get stuck if the bike sits for an extended period without being started.
    You should be able to hear a whirring sound when the key is first turned on.
    If not, the pump MAY be stuck. I have replaced one of these.

    If the fuel pump is stuck, BMW will sell you a new assembly for >$400.
    Luckily, ebay sells the pump itself for $12
    https://www.ebay.com/itm/Fuel-Pump-F...Cclp%3A2334524

    If you replace just the pump, be careful with the rubber isolators. They are available but somewhat expensive. You will have to find them on similar (not f650) assemblies. I think i found them on a K1200 fiche.
    -Live as fully as you can as long as you can-

  6. #6
    If I might - we now have two F650s with different symptoms. The discussion needs to differentiate between the OP - cranks but needs starter fluid to start and the second one which won't crank. Otherwise we will be totally nuts talking about two totally different problems.
    Paul Glaves - "Big Bend", Texas U.S.A
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  7. #7
    Registered User drneo66's Avatar
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    Quote Originally Posted by DROWINSKI View Post
    I have only seen choices for Next Thread and Previous Thread. I really only wanted to request a correct wiring diagram. How do I make such a request?
    Here's the link to the main subforum:
    https://forums.bmwmoa.org/forumdispl...-F-amp-G-bikes

    Click the blue "Post New Thread" in the upper left and that will generate a new thread where you can post your question.
    Current: 2007 BMW R1200RT, 2013 F800GS
    Former: 1995 BMW K75S, 2009 BMW G650GS
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  8. #8
    Just as an update. Had attempted to clean the injector but still no luck so went ahead and replaced the injector and the fuel filter/pressure regulator and she fired right up. So, problem solved. Other than being a really tight space, was a relatively easy fix. Thanks to all for the suggestions.

  9. #9
    Fortis Fortuna Adiuvat Omega Man's Avatar
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    Quote Originally Posted by dcattafesta View Post
    Just as an update. Had attempted to clean the injector but still no luck so went ahead and replaced the injector and the fuel filter/pressure regulator and she fired right up. So, problem solved. Other than being a really tight space, was a relatively easy fix. Thanks to all for the suggestions.
    Great!
    Always nice to hear the end result
    OM
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  11. #11
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    F650GS, 2006 Won't Start

    Quote Originally Posted by drneo66 View Post
    Here's the link to the main subforum:
    https://forums.bmwmoa.org/forumdispl...-F-amp-G-bikes

    Click the blue "Post New Thread" in the upper left and that will generate a new thread where you can post your question.
    Thanks. The link you gave finally allowed me to see the "Post New Thread". Previous log ins did not show that choice. Don't understand why. I will delete any of my posts on this subject (if I can). Now I wonder if a request for a wiring diagram should be made in the forum or in the Fleamarket. I am ready to contact advertisers in the magazine. Local BMW dealers have been no help. That's why I went to the forum.

  12. #12
    not so retired henzilla's Avatar
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    Haynes or Clymer May be best bet for a wiring diagram , saw one from Haynes that was a digital version as well

    https://haynes.com/en-us/bmw/f650-fu...BoCdQ8QAvD_BwE
    Steve Henson-Mod Team and past prez SABMWRA

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  13. #13
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    Quote Originally Posted by henzilla View Post
    Haynes or Clymer May be best bet for a wiring diagram , saw one from Haynes that was a digital version as well

    https://haynes.com/en-us/bmw/f650-fu...BoCdQ8QAvD_BwE
    Thanks. I have both of those manuals for my R75, but neither one for my F650GS. I downloaded a manual for it some time ago and that is what I have been using. I will try your suggestion. I have 3 different wiring diagrams and they have been useful in the past since the problems were common to all of them. This one is not. The manual I have is from BMW AG Motorcycle Division. It shows a fuse block with 4 fuses. I have 8.

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