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Thread: Starting Problems After Air Filter Replacement. '95 K75

  1. #1
    Registered User argent brick's Avatar
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    Starting Problems After Air Filter Replacement. '95 K75

    I now understand why all of you say that it is a pain in the ass to deal with the air filter. I finally checked my air filter today.
    The PO installed a K&N and it is super dry. I question if he used any oil on it.

    My biggest problem is that my bike will not start now. No wires were unplugged or anything. Any ideas?
    Last edited by deilenberger; 11-01-2013 at 05:01 AM. Reason: added year/model to title
    Lynn
    MOA #57883
    Current Ride: 1995 K75 Standard
    Past: 1978 Yamaha XS 750, 1976 BMW R60/6

  2. #2
    3 Red Bricks
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    Did you dislodge the 2 1/2" rubber elbow that connects the air meter to the intake plenum?


    LONG MAY YOUR BRICK FLY!

    Ride Safe, Ride Far, Ride Often

    Lee Fulton Forum Moderator
    3 Marakesh Red K75Ss
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  3. #3
    A bozo on the bus deilenberger's Avatar
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    Lynn - per: http://www.bmwmoa.org/forum/showthread.php?46057 - I'm adding the year/model (assuming it's the bike in your sig) to the thread title. Please do so yourself in future tech posts.
    Don Eilenberger http://www.eilenberger.net
    Spring Lk Heights NJ NJ Shore BMW Riders New Sweden BMW Riders
    '07 R1200R (current ride) and some bimmers.. and a Porsche

  4. #4
    Registered User argent brick's Avatar
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    Quote Originally Posted by 98lee View Post
    Did you dislodge the 2 1/2" rubber elbow that connects the air meter to the intake plenum?


    I did move that at one point, so it could be a problem.

    I am guessing that you know something that I don't. My first though is that the bike would still start and run. It would just get MUCH more air than it should so it would run very poorly.

    I think I am about to learn something. My 2 1/2" duct is not in good shape. I have a new one on order. Tell me, what would the result be if the elbow is missing or torn or one of the clamps was not tight enough?

    By the way, the PO installed a K&N filter. What is your opinion of them?
    Lynn
    MOA #57883
    Current Ride: 1995 K75 Standard
    Past: 1978 Yamaha XS 750, 1976 BMW R60/6

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    Curmudgeon At Large Bobmws's Avatar
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    Quote Originally Posted by argent brick View Post
    I did move that at one point, so it could be a problem.

    I am guessing that you know something that I don't. My first though is that the bike would still start and run. It would just get MUCH more air than it should so it would run very poorly.

    I think I am about to learn something. My 2 1/2" duct is not in good shape. I have a new one on order. Tell me, what would the result be if the elbow is missing or torn or one of the clamps was not tight enough?

    By the way, the PO installed a K&N filter. What is your opinion of them?
    Read this.
    Bob Weis
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    Quote Originally Posted by argent brick View Post
    I did move that at one point, so it could be a problem.

    I am guessing that you know something that I don't.

    Probably.


    Quote Originally Posted by argent brick View Post
    My first though is that the bike would still start and run. It would just get MUCH more air than it should so it would run very poorly.

    Not true. It would get less fuel than it should. It would still suck in the same amount of air that the pistons displace, but the air meter would not register all of that air. So the computer would only inject enough fuel to match what the meter sees.



    Quote Originally Posted by argent brick View Post

    I think I am about to learn something. My 2 1/2" duct is not in good shape. I have a new one on order. Tell me, what would the result be if the elbow is missing or torn ?


    It wouldn't run.


    Quote Originally Posted by argent brick View Post
    By the way, the PO installed a K&N filter. What is your opinion of them?

    Paul and Don don't care for them for their poor filtration capabilities. The stock filter filters better and provides more than enough flow. But that is not why it won't start.




    LONG MAY YOUR BRICK FLY!

    Ride Safe, Ride Far, Ride Often

    Lee Fulton Forum Moderator
    3 Marakesh Red K75Ss
    Mine, Hers, Spare

  7. #7
    Registered User argent brick's Avatar
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    Thanks for the quick answers. It appears that my starting problem stems from the duct between my air box and plenum.

    I will let you know if the new duct corrects the problem.
    Lynn
    MOA #57883
    Current Ride: 1995 K75 Standard
    Past: 1978 Yamaha XS 750, 1976 BMW R60/6

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