Installing an Acewell speedo/computer on an airhead --

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

  1. Tim McKittrick

    Tim McKittrick Long timer

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    I suspect the speedometer will be trying to convert pulses to distance traveled, so you need to find how far the bike goes between each pulse signal. I would think your pick-up will read one pulse per revolution- so you could try figuring out how far the tire moves per revolution of the speedo drive and use that number (it would be in millimeters if you were using a Trailtech unit, for example) as your "wheel diameter" figure. I would first mark a spot on your garage floor with tape and set the rear wheel on it, and mark the tire as a start position. Use a piece of wire or the end of an old speedometer cable to make a flag that can fit into the transmission speedo drive. Roll the bike forward in neutral until the transmission flag has made one revolution. Mark the spot on the floor where the tire has stopped. The distance between the tape marks on the floor will be the "tire diameter" figure you need.
  2. batoutoflahonda

    batoutoflahonda Long timer

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    yeah, that would be easier. :lol3

    been working on planes and bmws too long.
  3. DimitriG

    DimitriG Adventurer

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    thanks a bunch guys! im gonna have a crack at this today, i just need to figure out the wiring now. the koso manual isn't miuch help, as it doesn't actually describe the individual wiring properties.

    there are 3 wires out of the gauge, i suspect that 2 of them are pickups for the pulse and one power (not needed) for the supplied magnetic front wheel sensor.

    hopefully have some results tonight :evil
  4. Sic Semper Tyrannis

    Sic Semper Tyrannis Plays with Banjos, Boats and Bikes...

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    Some one could make some money selling these things on line in a coherent fashion. So far I haven't seen one site where it shows the options or model numbers clearly.

    If I can't fix the speedo case I am going ACEWELL!!

    These are very cool.
  5. fadingfastsd

    fadingfastsd Looking for riding partner near Fort Collins, CO!

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    Hey guys, I'm Evan, I was the R&D Mgr & Engineer at Electrosport Industries up til last April. (Was laid off when the company went under...then screwed by the new owner, don't get me started...)

    Anyways, I'm really familiar with the Acewells. Electrosport was the US distributor for them. I'll be using a couple on my R90 build (see my sig for link). If anybody needs help or has questions about them just let me know.

    As for the 2800 series (round housing like bpeckm used),
    You CAN use the Gen light (its actually a hazard light indicator). You'd have to take the housing apart.
    The outer ring on the 2800's does come off, use small screwdrivers to pry the ring off. You can then pop out the unit from the housing.
    You can isolate the ground for the gen warning light, and use it for the gen function. you'd have to solder to the LED itself and run a seperate wire.

    If you have other questions, let me know!

    Evan
  6. Padmei

    Padmei enamoured

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    Good on ya mate I'msure your expertise will help out a few people here.
  7. DesmoDog

    DesmoDog Desmo's my dog

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    +1

    I'm trying to figure out if I can mod an Acewell to drop into an old Ducati headlight shell. I've forgotten the numbers now but the hole is slightly smaller than the Acewell body from the specs I saw. Modding the headlight isn't an option but I've got no qualms about cutting up the Acewell... if I could figure out which one to buy and where to buy it.
  8. fadingfastsd

    fadingfastsd Looking for riding partner near Fort Collins, CO!

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    I pulled a 2800 series out of it's housing, and mounted it into the the stock speedo cluster (replacing the tach) in an 86 FZ750. The Acewell circuit board itself is quite a bit thinner than the round metal housing.
    I forgot to take pics when I had it all apart for the FZ a couple months ago.
  9. edray

    edray cascadian

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    Hello,
    wondering if anyone has figured out which acewell speedo cable will work on our airheads??
    dime city(great guys) initially sent me an S8 when i bought my 2853, not close..sent them images of what i needed for my 78 R100S..they then sent me an S5, looks closer, but wider diameter,couldn't fit in plastic insert and not right,plus no way to get rubber seal boot over the tapered cable end..
    Any thoughts?
    The acewell homesite page never responded to my first inquiries three weeks ago.
    I can always go w/ the supplied wheel sensor set up, but the other option seemed like easier, less obtrusive ..as the dime city guys mentioned
  10. anonny

    anonny What could go wrong?

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    Hi Evan, any idea how to get hold of these guys for warranty issues? Mines been pooched from the get go.
  11. DimitriG

    DimitriG Adventurer

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    hi, I'll post a some pictures later tonight, do you mean the transmission cable from acewell? Yes, it works great. later, later :D
  12. bpeckm

    bpeckm Grin!

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    Is it later enough yet....?



    :D
  13. fadingfastsd

    fadingfastsd Looking for riding partner near Fort Collins, CO!

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    Sorry but that's probably not going to happen :(
    Electrosport went out of business in April, and was purchased by Pro-Com engineering (makers of CDI boxes/regulators). Electrosport is back in business just making stators, they no longer carry Acewell parts.

    Baja Designs (www.bajadesigns.com), has the Acewell distributing contract.
    You could try and contact them and see if they will help you with warranty claims. I'm not sure if they're obligated since you got it from Electrosport.
  14. DimitriG

    DimitriG Adventurer

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    ok, pretty disappointing photos, sorry.
    but i really didn't have any issues other than finding the correct wires to use, remember, im using the koso speedo, you Acewell boys will have no such issues.

    plugged in the tyre circumference in the speedo and jacked up the back wheel, into 3rd with some gas and then started to try different wiring combination's, at the same time hoping not to burn anything out, but it worked second try. i am getting and accurate speed in all gears.

    [​IMG]
    [​IMG]
  15. AndyR65

    AndyR65 n00b

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    I used bpeckm's instructions as a basic template to install a Motogadgets Tiny on my 83 R65.
    I haven't had a chance to get it out on the road yet (waiting for fenders and tank, at the painter's).

    I'm unsure if the separate LED charging light will work properly.

    Do I need to add some sort of resister since it's LED, or should I switch it out for a standard filament bulb?

    I want to make sure that the alternator field get's a proper signal to go to work.

    The Motogadgets is similar to the Acewell, in that you need to run a extra external light.

    Tried to post some pics, but no dice, maybe cause I'm a newbie.
  16. bpeckm

    bpeckm Grin!

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    Hot dam, newbie... welcome, I think...:confused

    To answer your question about the resistor with the LED, yes you will need to use one, since LED's by themselves don't provide the electrical path necessary for that system to work.

    Easy to do, though, you can actually buy the resistor here for the princely sum of $3.50. Or, if you are electrically minded, I am sure that you could buy the proper resistor from your local RadioShack for even less...

    but Motorrad Elektrik does a lotta good stuff for our airhead world, so I would do bidness with them....

    :D

    PS I now have an Acewell to put on OleRed, when the time comes this wintah....:jump
  17. AndyR65

    AndyR65 n00b

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    bpeckm, thanks for the reply.
    I'll pick one up from Motorrad Elektrik. I bought a set of spark plug wires and ignition coils from them last year, great people to deal with.
  18. ducsingle

    ducsingle Been here awhile

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    Good thread.

    I'm outfitting my recently acquired R100R as a workhorse daily rider/commuter and will probably replace the (incredibly ugly) stock instruments with a Vapor. That will open up room for a GPS mounted in the same area.

    This Auto Meter motorbike unit is sort of a modern rendition of the /5 instruments with an analog speedo/tach, odometer, and four indicator lights - - - plus a trip meter that is sorely lacking on the /5 setup.

    http://procycle.autometer.com/CatalogGaugeDetail.aspx?gid=205

    Not incredibly cheap at an MSRP of $412, but I'm really tempted to install one in a /5 headlight shell on my /2 conversion sidecar rig.
  19. bpeckm

    bpeckm Grin!

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    and we need pics... that looks like a gorgeous unit, and I would love to see what it looks like on the bike :thumb
  20. AndyR65

    AndyR65 n00b

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    Yeah, I'm stoked with the Motogadgets Tiny.

    Tried again tonight to upload a couple of photos, but no dice.

    I should be getting my tank and fenders back from the painter's this next week, so I'll give it another try then.

    Thanks again bpeckm, for the great info in this thread, really helped me out with my install. :clap

    Cool to see the tranny speedo sensor is possible, think I'll try to go that route in the future and ditch the magnet sensor I mounted on the front wheel.