'99 M750 Tachometer Solution?

[bond0087]

Doh! I had no idea that the 99 and 2000 m750 wiring was different; sorry for the misinformation.  You probably already have a wiring diagram to work with for your bike, but if not (or you want a nice color one), I scanned in the diagram from my Haynes manual.  (The document has 2 wiring diagrams, the one for the 99 750 is on the right I believe.) http://www.mediafire.com/download.php?uqlkqp12jr8j93f

[MotoPsycho]

Correction!! The wire I questioned on the 2000 model print is a coil negative. It's marked on the bottom of the coil. Same as mine but I still have to run my own wire to it.

[Doc]

How did the Biker's Choice Mini Tach work out?
Doc

[Doc]

Oh, and a correction to the "mine must have 2 pulses" thing.  I was wrong.    Stew was right.   

I re-calibrated the tach today after a ride where I realized that my bike was probably not revving at 2600 at 80 MPH.

[Duck-Stew]

Oh, and a correction to the "mine must have 2 pulses" thing.  I was wrong.    Stew was right.   

I re-calibrated the tach today after a ride where I realized that my bike was probably not revving at 2600 at 80 MPH.

Thanks for that...  It was puzzling to think I could've ever been wrong.  (<-- SARCASM)

(seriously...  glad it's fixed!)

[Thermite]

I re-calibrated the tach today after a ride where I realized that my bike was probably not revving at 2600 at 80 MPH.

So your idle is set at 2100?

[Doc]

Not anymore.

[Doc]

OK, A recap for anyone researching the archives for digital tach installation:

I have a 1999 carbed 2V M900. No tachometer from the factory (WTF?!). I picked up a digital induction-style tach on closeout from bike bandit for under $25.

Installation was as easy as wrapping a wire around a coil wire, choosing 2 options on a setup menu, and sticking the tach unit to my bar clamp.  Setup of the tach was to set it for slow readout updates (1/second) and to read 1 pulse per revolution (for 2V 900 Monsters).

It works fine and appears to be fairly accurate.  It looks pretty good centered on the bar clamp.  However, that puts it out of my field of vision.  I plan to make a bracket and move it to the top-right side of the gauge cluster.  One of the fairing screws is right behind it and it should not be hard to fabricate something.  It does not update smoothly. It is a digital numerical display, so it updates at set intervals. Every 1/2 second was too frantic. Every second is much better.  While riding, this setting does not show rapidly changing numbers. 

3 minor downsides to this unit that I see so far:
1. It's not lit, so I can't see it at night. Not a problem for general riding.
2. I would prefer an analog readout, but this is not bad.
3. This the TTO Tach also has an hour meter built in. While the bike is not running, it will display the pitifully low number of hours I ride my Monster.

Overall it works as expected.

[Ripple Rock]

I have a 2000 M900IE (fuel injected). Im trying to adapt a DP Instrument Panel Kit for 600/750/900 Monsters up to 1999 to it. The pins pretty much line up perfect Except the tach. The DP kit tach has a separate green wire running of it. If you try and run this wire to CPU pin it doesn't work. If you run the wire to a coil terminal it works BUT runs at twice engine speed, ie 2000rpm instead of 1000 rpm. There are 3 brass screws in the back of the tach body, are they for adjustment? How can I get tach to read correctly

[ducpainter]

I have a 2000 M900IE (fuel injected). Im trying to adapt a DP Instrument Panel Kit for 600/750/900 Monsters up to 1999 to it. The pins pretty much line up perfect Except the tach. The DP kit tach has a separate green wire running of it. If you try and run this wire to CPU pin it doesn't work. If you run the wire to a coil terminal it works BUT runs at twice engine speed, ie 2000rpm instead of 1000 rpm. There are 3 brass screws in the back of the tach body, are they for adjustment? How can I get tach to read correctly

I don't know about the three screws, but the number of pulses are wrong. I don't think you'll get that kit to work on an efi bike.