Electronic Tacho (180 triple)

Gazz

Gazz

New member
Location
Clevedon
I'll be firing my bike up soon, first time since it's rebuild. Whilst it's on the bench I was wondering about an issue I had with the rev counter. My needle never goes much over 6k, and yes I do know how the throttle works! It also waves around badly on it's way there, I've really got no idea what the revs are when winding it up. I'm a little concerned now as I've got new liners, rings and valve seats, want to be a bit more careful whilst running them in.

My questions is this, has anybody fitted an electronic tacho picking up from the coils? I was thinking of something like this on a temporary basis...

http://www.ebay.co.uk/itm/60mm-SMOKED-FACE-0-8000-REV-COUNTER-GAUGE-FIX-KIT-/140899682935?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item20ce468a77

I have a Witt2 (bronze coloured box) and I've mislaid the instructions, is there a wire running from this I can use for a tacho? Am I correct in remembering it has a 8k rev limiter, built in?

Gazz
 
Gazz,

The DMC II has no seperate provision for a tach connection.  Just take it off one of the coils.  Need to make sure you have a correctly calibrated tach, ie, a spark every revolution.  Many tachs offered for 4-strokes only show correctly with a spark every 2nd revolution... use one meant for a 2-stroke.

Rev limiter should be 8500, Mr.Witt can re-programm that to any limit you wish.

piet
 
Thanks for the info. I'm guessing one for a four stroke four cylinder with two coils (wasted spark) will also work, is that correct? I've looked on Ebay for 2nd hand item from a two stroke single i.e. Aprilia RS125 but again I'm guessing although they are electronic they won't work because they run on a signal from the ECU rather than induction from the coil, is that also correct?

Gazz
 
Gazz said:
Thanks for the info. I'm guessing one for a four stroke four cylinder with two coils (wasted spark) will also work, is that correct? I've looked on Ebay for 2nd hand item from a two stroke single i.e. Aprilia RS125 but again I'm guessing although they are electronic they won't work because they run on a signal from the ECU rather than induction from the coil, is that also correct?

Gazz
Click to expand...

Hi Gazz,

look for a bike that had carburators (FZR Yamaha or Suzuki GSX-R etc., all up to 1990), they should work fine. Almost everything with EFI had a direct connection from the Tacho to the EFI computer and get a rectangular 4,5 or 4,7Volt signal. They will die once you rev the bike to more than 2.500. Guess why I know...  :-[

If you had an Ignitech, a nice thing would be to use a Zane Laverda tacho. The ignitech has a programmable tacho output and the Zane tacho has LAVERDA on it... looks nice... Even the Zane Speedo can be used, almost correct gearing  ;) All you need is the right cable to connect the speedo to your speedo drive shaft on the front wheel.
 
Or with a $39 ioio board, a bit of soldering and a bit of programming (already done) you can have the tacho on your android mobile or tablet. Then you just need a bike mount for your phone and you are away.
 
chrissoz said:
Or with a $39 ioio board, a bit of soldering and a bit of programming (already done) you can have the tacho on your android mobile or tablet. Then you just need a bike mount for your phone and you are away.
Click to expand...

Sounds like something Drinko would do :LOL:
 
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