Joe, is that on pavement? 'Cause it was 75 deg here last week and I ran mine in the street with the Extech No. 5 plug, tuned just a little rich for the new fuel, and I couldn't get it over 170. For me that usually means 200 or so on the track, which is what I see a lot of guys saying. Some engines run cool, the heads are so good now, Extech seems to be one of them.