Rev Limit at 5,500 RPM

[wanobiben_imp]

Two questions come to my mind,
why did you change the gauge ?
when you say speedometer, you’re referring to the rpm gauge, right ?
or did you replace both “clocks” ?

I changed it to have a lower profile overall on the bike. I don't like the way the stock gauge sticks out so much. I went with a digital one as it has the smallest profile over any of the dials I've seen. I replaced the whole stock unit with an all in one digital tach/speedo/fuel gauge/gear indicator.

That would depend on the model year. The 2010-2013 ECU is not compatible with any later year. After that, maybe. Some research would have to be done. Like checking the part numbers for one.

I have a 2014 CB1100, no ABS or EX just the base model.
These are before and after pictures to show how much lower the profile is of the new meter vs the stock. Before:
After, with new meter:

Like mentioned in an above post, the OEM sensor is reading (or actually making) pulses from the slotted ring. So there are a lot of pulses going to the meter. And you can see the pulses from the sensor with an o-scope. I have done that and posted a video of them on youtube. They are just square waves whose freq. varies with wheel speed.

The signal on a serial data line will have some sort of word format as it is a digital communication between the two devices. We have no information on that format or how to interpret it. It could be a CANBUS type but I don't know.

So no, you can't just fire pulses from your speed sensor into the ECU (maybe yes on a 2010-13). Even if you could you would only be getting one pulse per wheel revolution instead of the more numerous pulses the pulser ring provides and speed data would be incorrect into the ECU.

I would imagine your new meter takes the speed data and encodes it into the word going to the ECU. And some setup on your new meter is incorrect or not compatible with the Honda.

I went to the US website for your meter and could not find that model. Maybe you could call them for more info.

I bought it off of [url=https://www.ebay.com/itm/304200414290]ebay. There are no brand names mentioned on the seller's listing. The only videos I could find of it on youtube were in some other language, but on their post they called it a [url=https://youtu.be/mHj7ywknCso]KOSO RX4N. I looked at [url=https://kosonorthamerica.com/product-category/meters/multifunction/]KOSO's website and couldn't find anything that looked similar.