Installing an Acewell speedo/computer on an airhead --

Discussion in 'Airheads' started by bpeckm, Nov 23, 2009.

  1. Beater

    Beater The Bavarian Butcher

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    Well ... after ~9,527 miles my Acewell just died. I have no RPM or MPH. But all of the indicator lights work ... and yes ... I've done all the troubles shooting ... including rewiring.

    *sigh*
  2. bill42

    bill42 Old-School BMWs

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    sorry to hear that. Did you contact acewell? They have a contact section on their corporate site. Maybe they'll do something.
    On the other side of the coin, if mine lasts almost 10,000 miles after I finally install it, that will mean it will break in about 10 years for me! Between 2 bikes I'll probably average 1,000 per each bike annually. You are pretty lucky you get to ride so much.
  3. MIOB

    MIOB Long timer

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    I'd try contacting them like Bill said. contacted them a while ago about something else and they responded very quickly (and very positively).

    My Acewell has been on my BMW for 7 years or so now and still going strong.
  4. band-aid

    band-aid Adventurer

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    I recently installed an Acewell 2853 on my BMW R 60/6. I opted for the cable drive converter instead of the magnetic bike style counter for the speedometer. Installation was a cinch but the speedo reading is off. How do I calibrate the speedo for the bike given that it is not reading rotations of the wheel and instead counting revolutions of the cable? Any help would be appreciated. Thanks!
  5. mohabie

    mohabie Adventurer

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    Oddometer:
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    Just installed an Acewell into a fiberglass headlight bucket. The outer housing was pressed on, so it was somewhat of a challenge to create an internal bracket and external bezel to make it all work, but I did it!

    I got lucky with the plastic bezel, while looking online I found an extruder company that did mass quantities of office furniture computer grommets, the kind you find on your desk that lets you feed those computer wires through the desk in a nice, neat manner. The bezel that trimmed off that grommet looked PERFECT online, so I moved some papers around, popped the one off my desk and wouldnt ya know it, it fit the Acewell PERFECTLY! After expanding the instrument hole on the bucket to fit the new bezel, and building an internal bracket to secure the Acewell from inside the bucket, I was in business. A little bondo to fill in the sides and it will be perfect.

    Here it is!

    [​IMG][​IMG]
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  6. bpeckm

    bpeckm Grin!

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    Very clever!


    I have never gotten the second Acewell to work on Ole Red... so I am talking with Dime City Cycles, where I bought it, and hoping that I can get another one ... the one that DID work was awesome!


    [​IMG]




    :D
  7. Nicholasdamen

    Nicholasdamen n00b

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    I have a suggestion for the charge light indicator issue
    Here is what I did you can get more info here
    Airheadr80.tumblr.com

    My solution is to install a change over relay, basically the neg wire suplly that gies to the charge indicator will control a coil of a relay that operates a n/o contact that is supplied via a positive ignition switched wire. I’ve done this and tested it and it all works fine. Feel free to contact me if you require a wiring diagram of this :)
  8. Super rider

    Super rider Adventurer

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    Did you ever get an answer to this? I have the same problem. Just installed mine with the converter cable and it's way off. It's over by like 15mph. I was wondering if there was a way to calibrate it as well.
  9. bill42

    bill42 Old-School BMWs

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    This concerns me as well. I haven't installed mine yet but I was looking forward to the direct pick-up sensor accuracy.
    You would think that there is a ratio adjustment that would work for either speed sensor. The airhead alone comes in 3 or 4 different speedo ratios. If nobody has figured this out by the time I mount mine I will call acewell customer service.
  10. Nicholasdamen

    Nicholasdamen n00b

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    The acewell site has the settings for this on their
    Site under the sensor. I think it's 1380 and 1400
    Depending on which model BMW you have
    Here is the link
    http://www.acewell.de/en/accessories-parts/speed-sensor/acewell-ace-ta7-bmw-boxer
  11. Padmei

    Padmei enamoured

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    Has anyone had any luck fitting an alternate aftermarket speedo other than the trailtech or acewell? I'm after something small or retro but not expensive- mutually exclusive probability high.
    I like these but I would assume they are run off the front wheel
    http://www.trademe.co.nz/Browse/Listing.aspx?id=477492269

    is there a general rule re ratios for speedos? There must be some crossover between makes.
  12. bpeckm

    bpeckm Grin!

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    Ratios vary all over the place... no easy conversion with mechanical speedos...at one point I was looking at the XS650 speedos but the ratios are all wrong.

    :D
  13. Padmei

    Padmei enamoured

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    cheers. Bloody designers - wish they'd sort their crap out:lol3
  14. adventure950

    adventure950 Anglo-Saxon

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    Here is the answer to your question. Before fitting the acewell, it is necessary to find how far the vehicle moves with a single turn of the speedo cable.
    Mark the tyre and ground, and push forward 1 wheel revolution - measure the distance travelled in MM.
    Put a piece of tape on the end of the original speedo cable to produce a flag, push the bike forward 1 wheel revolution again, but this time count the number of revolutions of the speedo cable.
    Divide the distance travelled, by the number of rotations of the speedo cable, and enter this number into the acewell.
    e.g. If the bike moves forward 1700mm and the speedo cable turned 3 times, then enter 567 into the C screen Regards Jake.

  15. bpeckm

    bpeckm Grin!

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    I "calibrated" by trial and error: find one of those "your speed is xx" that the cops put out to show you much you're speeding.... then while doing a steady rpm, note what the radar says vs. what the Acewell says... then go into the adjustment screen on the Acewell and try changing it by ten or twenty, whatever, and ride by again: repeat until you are satisfied that it is accurate. Works great!

    :D
  16. Boxer Metal

    Boxer Metal Mad Scientist

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    I just installed one for a customer and there is no reason you should have to go to this much work. Solder the blue wire from the main harness to the proper wire on the Acewell and be done.
  17. mohabie

    mohabie Adventurer

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    Finally! just got it done (feathering in the bucket to the computer desk bezel). Here is the finished product!

    [​IMG]

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    [​IMG]
  18. Padmei

    Padmei enamoured

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    That is fantastic work there Mohabie!
  19. bill42

    bill42 Old-School BMWs

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    Yes, very nice.
    I was thinking... as a possible American twist to the Cafe Racer, why not remove the gauge there and put a can of coke in that cup holder! Bam! New trend.
  20. Boxer_Bolshie

    Boxer_Bolshie n00b

    Joined:
    Apr 9, 2012
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    Currently building up my '84 R65 and am now sorting through the bike wires and Acewell speedo wires... arg, a guy can go colour blind looking at all those wires! If I had taken a 12v electrical course in school I would have failed it for sure and if I had hair it would be gone by now from pulling it out!

    A little further along since this pic was taken
    [​IMG]