2" 52mm Tachometer Blue Digital LED Tacho Gauge for 12V Car AUTO 4 6 8 Cylinder (Black)

work s like need to

I've used this on my motorcycle, (1998 Honda Shadow 750) works just fine, has withstood the outside environment with 3D printed mount.Eay to connect, no issues.Readable in all angles of the sun all day.

Tested the tach against my known working tech on my test stand ,and it's 500 RPM off at idle

Throw away the limited instructions that come with this tach, On the back, you will see what looks like (and is labeled like) a toggle switch. It's not. It's an intermittent switch to use to change the cylinder count which I will explain in a second.First, connect the tach to 12v power, Once connected, it's going to most likely default to a 1cyl engine. Using the intermittent switch on the back, hit it once and you should see a "1" displayed showing the current setting, then tap it again for a "2" and again for a "3" until you see the number that corresponds to the number of cylinders your engine has. Once you connect the signal wire (and assuming it's transmitting 1 pulse per cylinder) the correct RPM should be displayed.As others have mentioned, there is a fair amount of delay as it only updates maybe 1x or 2x per second. If you need something more accurate, you'll wind up spending a LOT more money. However, if you are simply looking to see what RPM your idle is at, your RPM at cruising speed, etc, this will work well.

I am updating this review to 5 stars because the seller was very quick to update the description to include the 10 mm thread, and also offered to provide a full refund for the price of the product since I was not able to use it (even though I did not request a refund). I really appreciate the quick response and the great support.-------------------------------------Original review: The sending unit (sensor) has a 10 mm thread, not 1/4" NPT, I wasn't able to use it. It would have been good if this information was provided in the product description.

Nice kit, slow reaction time tho

Reasonably simple to install, put the 12v from the gauge to the ignition switch and the 12v for the sensor from the generator via the rear light. So in my configuration the sensor is powered only when the lights are on and in low-beam.The sensor takes an Amp when initially heating up and a half amp when running, and I didn't want to load the battery with the heater and the starter at the same time. Can definitely tell when it's on with a 50cc bike.

I like the look. Installation was pretty simple, but after a couple days it went to 0 with the "WARNING" illuminated. I shifted back and forth through the cylinder settings and tried to set it back to 8 cylinders. NO GO!Someone in other reviews mentioned adding a resistor but didn't mention on which side or what resistor. Does the seller have any idea?