[amgarb]

Since many of the photos from earlier in this thread are long gone, I figured I would document what worked for me.

I bought my tachometer from fleabay. It was $14 (best offer with free shipping). The description was “LED Motorcycle Tachometer Fit Suzuki Intruder Volusia VS 700 750 800 1400 1500"



It came with no instructions and the wiring as described in the listing was quite Chinglish:

Wire Connection:
Long red- positive, Long Black- Negative
Short Green- Ground,Short Yellow/Black-Engine Signal
Short Black- power/ignition lock positive

After online research, I determined:

• The long black (-) and long red (+) are for the backlight.
• The short green is ground
• The yellow/black is the input signal to the tach.
• The short black is power to the tachometer.

So...



I combined and extended the long red and short black and connected them to power at the horn. (Black wire in my photo below. But you can barely see it since I pierced the black tubing and threaded it through.)

I also combined and extended the long black and short green and grounded them at the coil. (Blue wire in my photo below.)

I extended the yellow/black wire and connected it to the coil. (Brown wire in my photo below.)




Fired it up and it worked. Tachometer reports 6800 rpm at 60 mph. A bit more than others report in this thread. The tach is somewhat on the slow side to respond; wish it was a bit faster.