Installing an Acewell speedo/computer on an airhead --

[DimitriG]

Originally Posted by MIOB

What I want is this with a rev counter.

I just can't get over it that Acewell is the only company making a affordable tacho with a rev counter as well.

closed i found were the moto GP ones or the MX ones

[rkatapt]

Do you guys have model numbers or links for the Koso and those VDO gauges? I don't seem to see any of them on their websites.

I really like those VDO gauges.

[DimitriG]

Originally Posted by rkatapt

Do you guys have model numbers or links for the Koso and those VDO gauges? I don't seem to see any of them on their websites.

I really like those VDO gauges.

i got my koso units here, they are designed to be aftermarket gauges, im not sure VDO do aftermarket kits

[igormortis]

Originally Posted by MIOB

Thanx :)

Sometimes the English here gets a bit to technical for me. Weird enough they don't teach you motorcycle parts in English classes at high school here.

Hey, that's OK. I probably be struggling with motorcycle parts in Dutch soon. Mijn Nederlands is niet zo goed als toen ik klein was!

[DimitriG]

ok, so Ive mounted the acewell tranny sensor. only one problem, how the hell am i going to dial it in

the sensor from the tranny has 2 wires while the koso front wheel sensor has 3, i popped up the back wheel and put it into 2nd and added some gas just above idle (should be around 15 kph right). searched the internet for and explaination of the wiring colours of both units, nothing. any electric guys out there? is there a way i can use my multimeter to figure this out?

then i just have to add the cir measurements and get it to translate somehow to wheel diameter. i'm assuming that the sensor reads rotations from the driveshaft and that maybe one full rotation of the drive is more or less one wheel rotation. i really don't know anything about the gearing etc, as you can probably tell

[kraut.burner]

Originally Posted by DimitriG

ok, so Ive mounted the acewell tranny sensor. only one problem, how the hell am i going to dial it in

the sensor from the tranny has 2 wires while the koso front wheel sensor has 3, i popped up the back wheel and put it into 2nd and added some gas just above idle (should be around 15 kph right). searched the internet for and explaination of the wiring colours of both units, nothing. any electric guys out there? is there a way i can use my multimeter to figure this out?

then i just have to add the cir measurements and get it to translate somehow to wheel diameter. i'm assuming that the sensor reads rotations from the driveshaft and that maybe one full rotation of the drive is more or less one wheel rotation. i really don't know anything about the gearing etc, as you can probably tell

I thought the guage had a function that allowed you to calibrate the speedometer..... Do you have an owners manual for the gauge?

[kraut.burner]

oh wait... you're not using an acewell? koso instead?

[MIOB]

For people interested in a cheaper Acewell. I cam across this:

http://www.dan-moto.com/lcd-digital-...oduct-137.html

See the similarities? I have no idea how good it is.

Found it on do the ton:

http://www.dotheton.com/forum/index.php?topic=19136.0

[DimitriG]

Originally Posted by kraut.burner

oh wait... you're not using an acewell? koso instead?

yep, using a koso unit with acewell tranny sensor. so i have some sporking to do

[batoutoflahonda]

Sporking? That's whet you kids are calling it now?

Best guess:

You could try hooking a multi meter to it, set it to ohms so you got some current going to the thing. I'm guessing that it works like a magnet pick up, in that when there is continuity (or no continuity, depending on how it's made) that would be one revolution converted to tire size or distance traveled. (pull the plugs, put it in gear, roll it to take the slack out of the gear train and find continuity or no continuity depending on how it's made, mark the tire or hang some thing off the bike to get a distance measure at that point, roll it again till you get a continuity/no continuity, and measure the distance traveled. Plug that into your formula.

Or find a GPS and head out for the day.

Are you getting no indication at the speedo? Did the speedo come with a wiring diagram you can post?

[Tim McKittrick]

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.

[batoutoflahonda]

yeah, that would be easier.

been working on planes and bmws too long.

[DimitriG]

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

[Sic Semper Tyrannis]

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.

[fadingfastsd]

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