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Buell Forum » Knowledge Vault (tech, parts, apparel, & accessories topics) » Do It Yourself: Machine Shop, Garage, Tools and Tips » Blast 500 with Tachometer, showing 1/2 RPM « Previous Next »

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Posted on Saturday, July 25, 2020 - 07:49 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

So I decided to put in a tachometer, and the one I got goes fine for sportsters and other Harleys, unfortunately it is reading 1/2 rpm because it's made for dual fire coils. Not only do I have a single fire, but single cylinder. There is a fix for these by adding a diode and resistor in series to the negative side of the coil but that's for two cylinders, I tried that and it's still showing 1/2 Rpm.

is there some kind of pulse multiplier?
I found a universal Tach converter for like 50 bucks, it can have any input be any output. it's overkill for what I need.

does anyone know circuits and electronics?

I'm sure if I can put the right diode and resistor and capacitors in the right place I could some how double the rpm.

anyone have any ideas?
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