Tacho Not Working Right

[NOBY]

HI THEAR MY TACHOMETER SEEMS TO BE PLAYING UP"" IT WORKS FINE OVER 2000 RPM BUT ON IDLE READS ZERO"" IT WAS FINE LAST WEEK BUT NOW GOD NKOWS
CAN YOU HELP""??
CHEERS RICK IN THE UK

[strom]

AFAIK the tach drops to 0 when there's a charging system problem. Check voltages... when the bike is running.

LP

[NOBY]

TACHO

FUNNY YOU SHOULD SAY THAT BECAUSE I AM HAVEING PROBLEMS WITH CHARGING WHEN LIGHTS ARE ON""
I HAVE HAD IT CHECKED WHEN RUNNING AND TOLD THAT ITS CHARGING CORRECT

[fredintoon]

Q & D charging test

Hi Noby,
for a quick & dirty charging check, point your headlight at a wall, garage door, whatever; mebbe 10 feet away (after dark works best.) If the splotch of light brightens as you rev the motor up from idle, it's charging. If it don't, it ain't.
Fred Hill, S'toon.

[NOBY]

tacho

will have ago cheers

[noeleo]

Re: Tacho Not Working Right

Originally posted by NOBY
HI THEAR MY TACHOMETER SEEMS TO BE PLAYING UP"" IT WORKS FINE OVER 2000 RPM BUT ON IDLE READS ZERO"" IT WAS FINE LAST WEEK BUT NOW GOD NKOWS
CAN YOU HELP""??
CHEERS RICK IN THE UK

OK, so I've tried all the "fixes" listed, and mine just isn't right, yet. At idle, it seems to work fine, but when revving the engine steadily, the needle fluctuates wildly. Any more suggestions? Thanks

[fredintoon]

connections?

Hi Noeleo,
what cured my tach was pulling the connectors apart, applying dielectric grease and then snapping them together and apart again several times to clean the contacts as there's no way I can see to get at those teensy little prongs & sockets directly.
My XS11SG has the two tach connectors in the headlight shell, I do believe that they are hidden elsewhere on the Standards.
Fred Hill, S'toon.

[xs1100yam]

Hi NOBY

In fact, the tacho is a frequencymeter; it shows frequency of AC comming from the AC generator (AC generator being on the crankshaft, frequency depends of engine RPM)
With your symptom, no AC when idle : the regulator is faulty (regulator is in the rectifier module )

[sksxs1100]

at one time i had the freq for each 1000 rpm.. i can get it again as we have all the goodies at work to do it with