CDI or Acewell

[Seifer]

My Acewell tacho seems to be a bit odd, it idles at 1200 rpm, jumps to 3500 as soon as the throttle is moved a touch, when on the move it gradually builds up to around 6000 rpm then drops back to 3k rpm then very slowly back up again.
When you go to slow down (say cruising at 3k rpm) it will jump back up to 6k rpm before lowering again.
So before the idiots jump in, this has nothing to do with me changing gear, but its more or less the same effect.
So whats causing it, CDI or dodgy acewell receiver.
Acewll is hardwired to the cdi rev wire with a 1k resistor in line.
Also round this mystery 3000rpm mark the revs are very stuttery, maybe unrelated and due to dud tuning but thought id add it in anyway.

[oldskool]

Its your Arsewell.

[Elapid]

My acewell hunk of shit does the same thing.

[sharky]

Its all down to the tacho feed to the acewell. There are various ways you can hook 'em up.
Each bike seems to be different...I used tach feed to stock clocks....jumped around....wire around HT lead...same thing...connected it to a coil pulse and bingo ..Purfick.
Its just a case of experimenting.

[DiscoDan]

I had a similar issue with the set of shiftlights I got for the racebike, the company that made them sent me a couple of resistors and maybe a diode that could be wired into a crude filter to clean up the signal from the coils/CDI. I'll see if I can find the details and post it unless some electrical guru here knows how to do it

[boris]

out of curiosity have u tried it without the resistor I didn't use the resistor on mine and hooked it straight up to the tacho wire out of the CDI and it seems to read true

[mozza]

i did the same as boris and all is good

[Gitzy]

Ya did same as boris and mozza, seems to run pretty good..

[RevHead]

fuck the tacho i just bought a digital speedo