Installing an Acewell speedo/computer on an airhead --

[craydds]

Looking through ignatz72's thread, it seems that one should use an incandescent bulb for the generator warning lamp. Has anyone tried an LED?
Read post #119 by Bill Harris here http://www.advrider.com/forums/showt...r#post18097765

[benthic]

Originally Posted by bmweuro

Thanks for the drawing. What size resistor did you use?

Snowbum says :Resistor discussion: Nearly any type of resistor may be used. It can be the old-fashioned type called 'carbon composition', or any modern type of 'film' or 'deposited carbon' type....or even a 'wire wound' type. The resistor value CAN be 470 ohms, but my tests indicate that 330 ohms is better.

Originally Posted by craydds

Looking through ignatz72's thread, it seems that one should use an incandescent bulb for the generator warning lamp. Has anyone tried an LED?
Read post #119 by Bill Harris here http://www.advrider.com/forums/showt...r#post18097765

from the same Snowbum article: The GEN lamp is rated at 12 volts and 3 watts. Ohms law says that the lamp resistance is 48 ohms when energized by 12 volts. I guess I'll poke around an autoparts store or radioshack...

EDIT: found this from Snowbum too about the Gen lamp:recommended 168 lamp = 4.90 watts, .35 ampere, rated 1500 hours, a.c.

Thanks!

[craydds]

Good info, thanks. I'll check the spec's on my little red lamp.

[craydds]

Tach cable has to go:


Gone:


Now, what do I do with the "hole" ? And the rubber grommet? Is there a solid rubber grommet - no hole for the cable?


Any ideas? What have my fellow inmates done?

[benthic]

I started hooking my Acewell 2853 up to my 1978 R80/7 today. it all went fairly well. My wire colors don't match what's been noted so far, but i think I've got it worked out.

My layout is:

Acewell--------------funtion----------------- BMW
orange-------------- turnsignal -------------new wire from signal
light green--------- high beam ------------ white
light blue -----------haz/Brake fluid -------blue/brown
purple--------------- nuetral ---------------- brown/black
gray -----------------oil pressure----------- brown/green
white ---------------- turn signal ----------- new wire from signal
black ----------------ground -----------------brown
brown --------------clock power -----------new wire to battery
red ------------------speedo ilumination---gray/black
blue --------------- fuel ---------------------- no match
yellow ------------- tach --------------------- black

left over bmw wires:
black/white - capped and using the new individual wires

blue
blue/green

I used the blue and blue/green as described in craydds' sketch below except i didn't wire into the acewell red, but the warning light I bought didn't come on... everything else appears to work though, so i'm wondering if i just got the wrong light.

Originally Posted by craydds

no pictures of my rat nest, i'll just embarrass myself;)

[bpeckm]

Originally Posted by craydds

Tach cable has to go:


Gone:


Now, what do I do with the "hole" ? And the rubber grommet? Is there a solid rubber grommet - no hole for the cable?


Any ideas? What have my fellow inmates done?

I simply used some black silicone caulk to fill the hole in the rubber grommet... Later front-covers (after the electronic tachs came in ('+78?)) don't have the notch for the rubber grommet, if you would want to go that way....!

I also used some high-melting-point grease, like wheel-bearing grease, to plug the hole inside the front cover where the tach cable had been.....

[craydds]

Originally Posted by bpeckm

I simply used some black silicone caulk to fill the hole in the rubber grommet. Later front-covers (after the electronic tachs came in ('+78?)) don't have the notch for the rubber grommet, if you would want to go that way. I also used some high-melting-point grease, like wheel-bearing grease, to plug the hole inside the front cover where the tach cable had been.

Thanks, bpeckm! Good solution. I will order a new grommet, because the old one is splitting into pieces.

[craydds]

Originally Posted by benthic

My layout is:

Acewell--------------funtion----------------- BMW

red ------------------speedo ilumination---gray/black


I used the blue and blue/green as described in craydds' sketch below except i didn't wire into the acewell red, but the warning light I bought didn't come on... everything else appears to work though, so i'm wondering if i just got the wrong light.

On my bike ('75 R90S) the grey/black is for instrument illumination, but is positive (+) only when the headlight is ON. That is why I used the BMW green/black connected to Acewell red; green/black is (+) when key is ON. On your bike ('78) the grey/black is (+) always when the key is ON ?
Good luck on your generator light. Test the lamp separately to make sure it lights up.

[Blane]

Originally Posted by craydds

Thanks, bpeckm! Good solution. I will order a new grommet, because the old one is splitting into pieces.

If you find one let me know. I don't think they sell those seperately any more.

[craydds]

Originally Posted by Blane

If you find one let me know. I don't think they sell those seperately any more.

part # 62-21-1-351-554, look here http://www.maxbmwmotorcycles.com/fic...1&rnd=08102012 . I ordered one this morning.

[MIOB]

Originally Posted by craydds

Tach cable has to go:

Gone:
\

Now, what do I do with the "hole" ? And the rubber grommet? Is there a solid rubber grommet - no hole for the cable?


Any ideas? What have my fellow inmates done?

If make the grommet really warm (in boiling water?) won't it become flexible enough to slide it over your Acewell cable?




Still enjoying my new Acewell 4454 a lot. It's a hughe upgrade from the already great 2853

[bill42]

My later r100 was made with an electric tach. Somebody with more knowledge than me can probably tell you what factory plug you need. If not maybe check the fische on maxBMW.com and look at a 1981 airhead.

[craydds]

Originally Posted by MIOB

If make the grommet really warm (in boiling water?) won't it become flexible enough to slide it over your Acewell cable?

You may be thinking of the Acewell speedometer sensor. There is no Acewell cable in place of the stock tachometer cable. The BMW tach cable is removed, that is why I need to plug the hole.

[MIOB]

Originally Posted by craydds

You may be thinking of the Acewell speedometer sensor. There is no Acewell cable in place of the stock tachometer cable. The BMW tach cable is removed, that is why I need to plug the hole.

Ok, sorry, misunderstood

[craydds]

Nice work, MIOB !! http://www.shedbuiltbikes.com/my-projects/ .