/5 starter relay

Discussion in 'Airheads' started by Captain Yesterday, Nov 27, 2013.

  1. Captain Yesterday

    Captain Yesterday Been here awhile

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    Looks like my starter relay took a dump, looking to replace it with a bosch generic relay 12v 20amp

    Based on this site http://bmwmotorcycletech.info/slash5cricket.htm

    Not sure on the re wire the numbers on the replacement relay are different from the web article, I have 85, 86, 87, 87a, 87, 30?

    Anybody have any experience doing one of these swaps?
    #1
  2. DiabloADV

    DiabloADV Semi-Occasional

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    A generic will not have the circuit that keeps you from hitting the starter while the motor is running. It's explained in that snowbum article you linked.
    #2
  3. elite-less

    elite-less Been here awhile

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    I run this Bosch relay (0 332 019 150) on all my /5's. They're so cheap, and small, I install two for a belts and suspenders approach.

    <img src="http://farm6.staticflickr.com/5476/11093114756_e02f08e6e3_c.jpg" width="600" height="800" alt="Untitled">

    It will bypass the starter protection... as mentioned by DiabloADV.

    If your harness is stock&#8230; wiring should be as such:

    85 - Brown
    86 - Green
    87 - Double Red
    87 - Red
    30 - Black

    You'll also need to add a jumper wire to connect the blue connectors.

    .
    #3
  4. Captain Yesterday

    Captain Yesterday Been here awhile

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    Sweet it works, Thanks :freaky

    125$ for a relay is about as crazy as 500$ for 70's ducati turn signals

    Also, I'm not running turn signals, so there should be less of a chance of hitting the starter when the engine is running.
    #4
  5. bpeckm

    bpeckm Grin!

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  6. blaine.hale

    blaine.hale Long timer

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    #6
  7. khale

    khale ride dirty

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    OP - just be careful with these bosch starter relays. As many have said, it bypasses the circuit that prevents the starter from being activated when the bike is running - that was by design by Bosch and implemented by ze Germans for good reason. If you are 100% certain you would never push the starter button while the bike is running, even on accident (which I find unlikely), you are better off doing the mod snowbum suggests (my brother and I did it, works great), or putting in a used starter relay from the flea market.
    #7
  8. DiabloADV

    DiabloADV Semi-Occasional

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    Those blue wires at the starter relay are the charging light and diode board circuit, not turn signals. That's how the relay "knows" the motor is running.

    You definitely need to jumper those or the bike won't charge. A jumper is built into the /6 relay to do just that.
    #8
  9. Michel77

    Michel77 Backyard Badass

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    +1 at the above, mine were disconnected at the relay and it didn't charge. It seems there is some confusion on the purpose of these wires as I was initially also informed that they were turn signal wires.
    #9
  10. Big Bamboo

    Big Bamboo Aircooled & Sunbaked

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    Sorry about that, I was referencing the info posted above.
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  11. elite-less

    elite-less Been here awhile

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    Great catch! That'll learn me from leaning on me memory! :D
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  12. Michel77

    Michel77 Backyard Badass

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    Hey, no worries man, thanks for chiming in when I posted.
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