SPORTSTER 1987 voltage regulator

Discussion in 'Sportster Models' started by dawroz, Oct 2, 2011.

  1. dawroz

    dawroz Member

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    Hallo friends.
    Im building my own sporty HD.
    I have engine 1987 year. Ive bought voltage regulator from 1997 year sportster.
    Anybody know if It fits? Or If not what years fit.
     
  2. speedyron

    speedyron Active Member

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    looks like 84 to 90 works
     
  3. fin_676

    fin_676 Experienced Member Staff Member Moderator Contributor

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    I replaced the vr on a an 87 sportster for a friend a few years ago and i am pretty sure it was a different unit from my 93 sportster part number for the 93 regulator is 74523-92 so new part for 92
    however the part number 74523 has variations of 84, 84a, and 84t that may be the correct one for your bike i just do not have a parts list for that year bike

    Brian
     
  4. dawroz

    dawroz Member

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    The real problem is that I dont have charging.
    I suppose it could be voltage regulator but engine is working good.
    I examined the cables going from stator and when engine is working - no stream.
    I dont know what to do now.
     
  5. Breeze3at

    Breeze3at Well-Known Member

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    There's several items in the self help area for checking charging system. Here is one http://www.hdtalking.com/archive/index.php/t-30685.html

    If your rotor or stator is bad, you have a VERY expensive problem. The charging system is built into the clutch hub. I priced one when I had my '87 XL in the 1990's and it was ridiculous. Lucky for me, it was the regulator.
     
  6. dawroz

    dawroz Member

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    One more think.
    If I speed up the rotor to 1000 rpm - what should be the voltage between 2 cables whitch go out of the stator???
    This is important.
     
  7. dawroz

    dawroz Member

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    Hallo. Is Anyone there? :)
     
  8. Jack Klarich

    Jack Klarich Expert Member

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  9. dawroz

    dawroz Member

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    I fixed charging in 1987 sportster.
    The problem was in unnapropriate position of the magnets in rotor.
    The magnets can't be put alternately - like in most bikes, but in one direction.

    magnetization goes in one direction (+-)(+-) instead of (+-)(-+)

    Uff.
    THANX FOR HALP