I know that many out there are constantly worrying about burning up their bikes when the outside temperatures get high. Personally, I feel like the vast majority worry needlessly about this. The engineers who design engines understand the principals involving metals and temperatures and design accordingly. This paranoia with heat that many have is making a lot of people very rich. I am not saying we need not worry about heat, because it should be a concern, all I am suggesting is that we need not let it get out of hand. Run good, high quality lubricants. Full synthetics are probably the best thing to do to promote a happy engine. They start to break down at a higher temperature range than dino oils. So, if you do get caught short some time and find yourself trapped in stop and go traffice it is comforting to know you have a crankcase full of high quality synthetic lubricant. They are a good thing. We should all be running a synthetic gear oil in the transmission too. Anything from a 75-90 wt or maybe a 75-140 if you ride in really hot weather is just plain being cautious. OK, having said all that, just for gibbles today I checked some of the temperatures on my 09 Touring bike just as I pulled into the garage after a 4 hour ride. The outside ambient air temperature was 104 degrees. Humidity- 37%. We were riding at a constant 70 mph on both concrete and asphalt highways. No stop & go riding. To check the various temperatures around the bike I used an infrared, digital thermometer from a distance of 3 inches. The thermometer is known to be spot on, so I feel like I a got accurate readings. The beam was pointed to "black" paint, not shiny surfaces. 1st reading: Next to the spark plugs-201.5 degrees farenheit. 2nd reading: Half way down the jugs-188 degrees. 3rd reading: At bottom of jugs-181.5 degrees. 4th reading:Bottom of crankcase, next to the oil plug-205 degrees. 5th reading: Several locations on bottom of crankcase-201 degrees. 6th reading: Center of front tire-126 degrees. Two inches to the side-134. 7th reading: Center of back tire-120 degrees. Two inches to the side-125. Why was it hotter two inches from the center of tire? I don't know, unless it is because the D407 tires have a different compound in the center this year. Maybe some "real, school educated engineers" can chime in here). All readings were taken within 60 seconds after parking so there was not much cooling. If anything, temps can sometimes rise a bit, immediately after turning off the engine. What we see here is that the temp next to the spark plugs (201) is about the same as it is at the bottom of the crankcase (205) where you would drain out the oil. This temperature range is well within what most good dino oil is speced out at today. Synthetics specs are even higher,upwards to 275 degrees+. Disclaimer: I do run a fuel management device. TFI brand, for whatever that is worth. I just use it, I don't work for them. So. relax. Put good lubricants in your bike and just ride. All I am saying is most of this add on equipment which is supposed to cool off a hot bike probably can't hurt anything, but the person who really benefits the most is not you, but the person who is selling it. Engines are supposed to run hot, there is fire down there, after all. It is supposed to feel hot to the touch when we touch our finger (98.6) to them. Any comments? Let er rip.