The first thing I bought from Brent was the fill plug temp guage. Don't know how accurate or how it relates to head temp, etc., but it is great for judging overheating. In stop 'n go traffic, if the thing climbs over 200 F., I'll turn right and go the long way. Normally it sits at about 175 to 190 depending on ambient temp and hard riding. Also, don't need tool to remove.
