RGS tach reading way high

Paul LeClair

Paul LeClair

Administrator
Staff member
Location
Calgary, Alberta, Canada
Hi all

my RGS has an older WITT ignition. When the WITT ignition was first installed the tach read way high. Wolfgang then provided some sort of resistor(?) that I wired in, and the tach readings settled down.

out on the bike today and the tach started reading way high. What I know is about a 1,000 rpm idle, the tach is showing as about 2,500 rpm.

anyone got any thoughts or suggestions, before I take off the bodywork to get at the wiring....? Can the resistor(?) or whatever it is, fail? Could it be as simple as getting another from Wolfgang? Other causes?

Paul LeClair
 
How high did it read before you fitted the resistor?
Similarly high?
Then that might be the issue.
If not then there may be some other issue.
Usually the bobweights fall off but that leads to an erratic needle rather than a high reading.

I had the opposite on one of my Corsas. The speedo permanently read way under by a couple of thousand except for tickover.
Standard ignition system.
I just got used to it.
 
thanks, Gents.

the tach was reading high when I first fitted the WITT a number of years ago. Installing the filter/capacitor thing from Wolfgang then solved the problem for several years.

the last year or two the tach needle has been reading roughly correctly, but has started to "swing" rather than hold steady, likely something in the tach like the needle weights as mentioned. Then the other day out of the blue the tach started reading at least 2,000 rpm high, plus the existing bit of "swing' to the needle.

Sounds like the very simplest approach is to order another filter/capacitor thing from Wolfgang, and ignore the issue in the short term. When the new filter/capacitor arrives, stick in place of the old one, if that solves the tach reading 2,000 rpm high, I can live with a needle that "swings" a bit for a while.

who is the "go to " person to send the RGS tach to over the winter for repair if the weights have fallen off the needle assembly?

Paul LeClair
 
When the weights fell off mine both times.... it just swung its' own tune about horizontally pointing to the left and did nothing else. Sat there when it was stopped as well. I can't imagine that the filter thingy could be buggered unless there's a wire broken or something.
 
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