B&L, your Zuma is AC right? I guess you can get those temp gauges for AC or LC? I agree, AC engine cylinder head temp (CHT) is very good tuning tool. I guess you need water temp sensor for LC? I need to get one of those temp gauges, and a tach too, thanks for posting link. I think not as critical for LC engines, but really a great tool for AC engines.
Tries, I think he posted pic of temp gauge for LC with water sensor. I checked Trail Tech website and appears they have several different sensors for AC and LC.