Hello everyone!
Now, I have a situation with a Kawasaki VN 2000 from 2010. We installed a aftermarket Tachometer as the motorcycle doesn't comes with one and the customer wanted it. Installation was rather simple, tach was grounded to chassis, and with this diy adapter, I was able to get it to show expected RPMs. Photo attached below, credit goes to 4strokes.com for schematic.
Now, I do have a problem with the "bouncy" needle on the tach. The thing is, on low RPM's, especially when engine is working on idle, needle is quite bouncy as it would be expected since this is a V2 engine with almost 2000ccm. However, customer really doesn't likes it and I would need to smooth that out. After some research, I found out that I would need to either purchase or make my own Signal Filter. If I understood correctly, this is just a low pass RC filter consisting of one resistor and one capacitor. Signal from the coil gets in the resistor which is in series with the tach (acts as a load), and capacitor is in parallel with it. Please, do correct me if I'm wrong at this point.
However, what values should I know to try to calculate values for resistor and the capacitor in this circuit? Or does anyone else has a better solution?
Every info is very much appreciated.
Thanks
Now, I have a situation with a Kawasaki VN 2000 from 2010. We installed a aftermarket Tachometer as the motorcycle doesn't comes with one and the customer wanted it. Installation was rather simple, tach was grounded to chassis, and with this diy adapter, I was able to get it to show expected RPMs. Photo attached below, credit goes to 4strokes.com for schematic.
Now, I do have a problem with the "bouncy" needle on the tach. The thing is, on low RPM's, especially when engine is working on idle, needle is quite bouncy as it would be expected since this is a V2 engine with almost 2000ccm. However, customer really doesn't likes it and I would need to smooth that out. After some research, I found out that I would need to either purchase or make my own Signal Filter. If I understood correctly, this is just a low pass RC filter consisting of one resistor and one capacitor. Signal from the coil gets in the resistor which is in series with the tach (acts as a load), and capacitor is in parallel with it. Please, do correct me if I'm wrong at this point.
However, what values should I know to try to calculate values for resistor and the capacitor in this circuit? Or does anyone else has a better solution?
Every info is very much appreciated.
Thanks