Bonneville T100 - Onboard Temp. Sensor

Mmmm well I wonder what the sensor next to the filter is????

I have the later 2019 watercooled T100.....just in the process of fitting a thermocouple engine them gauge to my bike.

I hate not have an engine temp gauge on a water cooled bike....yes I know it has the idiot temp warning bulb...bit late when that comes on.

Found a neat display unit c/w 2 thermocouples' on ebay £27GBP

Not idea yet how successful its going to be....but as long as I can see a trend I will be happy.

I can up date if interested....will work on air-cooled as well.

Not fitting the sensor under the spark plug....I am more interested in coolant temp.

Can report back if interested.....why I have it fitted.....hopfully in a few weeks.

The unit just sat on the table at home reads the room temp vey accurate.

So that encouraging.

Nick in the UK.

 

Temperature sensors are usually just thermistors whose resistance varies with temperature and hence a differing voltage drop which the ECU sees.
I doubt you'll find any specs for the OEM sensor. Typically, if diagnostic software shows a sensor fault it will be something like "open circuit" or "voltage out of range" and the sensor will just be changed for a new one.
There will probably be an intake air temperature sensor in the air box, the later water cooled twins certainly have one.
I made up a new IA sensor for my Street Scrambler which basically told the ECU that the intake air was much cooler than it actually was and richened up the mixture slightly. It certainly helped the occasional off-idle stalling stalling I had on my first one. These bikes run very lean on stock settings.