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Misses and loses power

Discussion in 'Motorcycle Tech Talk' started by Lucifer, Apr 6, 2009.

  1. Lucifer

    Lucifer Well-Known Member

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    Hey, a buddy of mine rides a 91 Ultra...the end of last year he had a new stator and regulator put in and a new secondary belt put on.
    The bike starts fine and runs but when he turns on the stereo it loses power and the bike starts missing.The swing arm was off to install the belt,I'm thinking he may have a bad ground. Nothing under the fairing was touched.
    Any ideas??:confused: TIA.
    Lucifer, Apr 6, 2009
    #1
  3. hotroadking

    hotroadking Super Moderator Staff Member

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    it only looses power when the stereo is turned on?

    The baggers run a 45 amp charging system
    there is a smaller system for the RK's Softails Dynas

    If he got the wrong stator/rotor he could be putting out the wrong (insufficent) amount of amps to run the whole bike.

    If you have a SM there is a way to put a meter on the output and measure amps, or volts coming from the stator and an amount it should measure.

    If he has the parts list I'd check to be sure you have the right stator/rotor combo...
    hotroadking, Apr 6, 2009
    #2
  4. Lucifer

    Lucifer Well-Known Member

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    Evo baggers had a 45 amp?? i think he said the lights are kinda dim , but bike runs...when he turns on the tunes it starts missing....thanks HRK...my bud is going over tonite with a meter to do some checking, first check will be alt output.
    Lucifer, Apr 6, 2009
    #3
  5. cowboy

    cowboy Moderator Staff Member

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    sounds like HRK hit it on the head , That's where I would start My brother did the same thing on his 98 ultra , shop gave him the wrong stater & it would'nt handle the radio , the shop gave him the right one & a new set of gaskets cause of there mistake
    cowboy, Apr 7, 2009
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  6. hotroadking

    hotroadking Super Moderator Staff Member

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    I know there is a high output rotor and stator, came on evo cop bikes,

    Just put one on the RK for Doug's 98.
    hotroadking, Apr 7, 2009
    #5
  7. Lucifer

    Lucifer Well-Known Member

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    I would be surprised if the dealership here gave him the right stator. I'm pretty sure it was just the stator replaced and regulator replaced.
    Cowboy do you know the alt output on your brothers?? my heritage has a 32 amp alt...I thought the Evo baggers had 38 amp and cop bikes had a 45 amp.
    Does the main ground just ground to a starter mounting bolt or is there a ground strap to the frame on them??
    But I think it would be safe to say if the output was less than 38amps he got the wrong stator.
    Lucifer, Apr 7, 2009
    #6
  8. hotroadking

    hotroadking Super Moderator Staff Member

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    I would check,
    Also if he replaced the regulator I'd check output at the battery with ameter

    Your stator runs to the regulator then the regulator back to the main circuit breaker the battery grounds to the frame in front of the battery, pull it out and make sure you have tight connections, then there should be a ground from the frame to the starter.

    If you find he has old cables, before you buy HD check with a freind of mine in WI that hand makes USA made cables, it's a little side business but it's USA made and helps him with the family expenses

    He calls it Yoopercables

    yoopercables at hotmail dot com is the email, Rich is his name. Good stuff I have them on the heritage, better stuff than stock.
    hotroadking, Apr 7, 2009
    #7
  9. cowboy

    cowboy Moderator Staff Member

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    lucifer all I know is that the ultra's & cop bikes use the same stator & have the amps both the evo & TC
    cowboy, Apr 7, 2009
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  10. hotroadking

    hotroadking Super Moderator Staff Member

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    yep its' got the big one's....
    hotroadking, Apr 7, 2009
    #9

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