Reply To: Oil operating temperature
You can read the oil line banjo of the rear cylinder, gives a good enough indicator of the temps if trying to compare with the front. The rear cylinder doesn’t allow much room under the frame.
Or do a custom job to bore the cylinder itself near its internal oil gallery and tap a sensor to it like what Hyosung does to the front cylinder on EFi machines, so you have to be careful here unless you have a spare cylinder to experiment on.