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Thread: slow starter

  1. #1
    ghostridery2k
    Guest

    Thumbs down slow starter

    i just finish instaling used engine in my 87 k75,it started slowly yesterday,after 15 min of runing i shut it off for a moment and when i try to restart it starter just slowly crank the engine,restart fail.for some strange reason starter will continue cranking even key was off and boiled the battery.i try with new battery today and still slow crank.starter gone bad?jump power to the starter bypassing relay still slow crank.

  2. #2
    DrPaul DrPaul's Avatar
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    Apr 2007
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    Quote Originally Posted by ghostridery2k View Post
    i just finish instaling used engine in my 87 k75,it started slowly yesterday,after 15 min of runing i shut it off for a moment and when i try to restart it starter just slowly crank the engine,restart fail.for some strange reason starter will continue cranking even key was off and boiled the battery.i try with new battery today and still slow crank.starter gone bad?jump power to the starter bypassing relay still slow crank.
    Sounds like the starter relay contacts have welded themselves together. This will require disassembly and repair or replacement of the relay. A low battery will do this especially when the engine is slow to start.
    DrPaul - 2008 K1200GT, 1973 R75/5
    2004 R1150RT - sold,1974 R90/6 - sold
    2002 R1150RT - sold,1987 K75S - sold

  3. #3
    Lift the rear of the fuel tank and remove the cover to the electrics box.

    Rap smartly on the relay located in the rear left corner of the box - the one with two heavy wires bolted to lugs on the edge of the relay.

    Install a fully charged battery - or a new one as needed - and get on with life with the bike.
    Paul Glaves - "Big Bend", Texas U.S.A
    "The greatest challenge to any thinker is stating the problem in a way that will allow a solution." - Bertrand Russell
    http://web.bigbend.net/~glaves/

  4. #4
    BUDDINGGEEZER
    Guest
    If you have to buy a new relay http://www.texasindustrialelectric.com/relays.asp

    Roughly 1/2 price. 75amp.

    Ralph Sims

  5. #5
    kayseventyfive
    Guest
    Quote Originally Posted by PGlaves View Post
    Lift the rear of the fuel tank and remove the cover to the electrics box.

    Rap smartly on the relay located in the rear left corner of the box - the one with two heavy wires bolted to lugs on the edge of the relay.

    Install a fully charged battery - or a new one as needed - and get on with life with the bike.


    How about desassembling the relay and cleaning the (presumably) pitted and carboned-up contacts. Can this be done?



    Quote Originally Posted by BuddingGeezer View Post
    If you have to buy a new relay http://www.texasindustrialelectric.com/relays.asp

    Roughly 1/2 price. 75amp.

    Ralph Sims
    Jusst to be sure, is it THIS ONE?

    http://www.texasindustrialelectric.c...0332002150.asp

    .

  6. #6
    Quote Originally Posted by Kayseventyfive View Post
    How about desassembling the relay and cleaning the (presumably) pitted and carboned-up contacts. Can this be done?

    .
    Yes it can be done. Prying will break the seal or plastic - and you can access the contacts. I'm not sure it is necessary. Often one tiny spot sticks, and when freed serves trouble free for many miles/years.

    I think every classic K bike owner is required to learn once: cranking with a low battery will stick the relay. After that we get more careful about this and don't do it again.

    Every spring (after winter storage) I get at least a dozen calls or emails asking about this problem.
    Paul Glaves - "Big Bend", Texas U.S.A
    "The greatest challenge to any thinker is stating the problem in a way that will allow a solution." - Bertrand Russell
    http://web.bigbend.net/~glaves/

  7. #7
    BUDDINGGEEZER
    Guest
    Quote Originally Posted by Kayseventyfive View Post
    How about desassembling the relay and cleaning the (presumably) pitted and carboned-up contacts. Can this be done?





    Jusst to be sure, is it THIS ONE?

    http://www.texasindustrialelectric.c...0332002150.asp

    .
    I believe so.

    Ralph Sims

  8. #8
    ghostridery2k
    Guest

    Talking

    i just install brand new battery and bike start right up no problems,i guess my other battery was week.thanx for help evryone, ........y2k

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