I'm still working on the summer heat issue but if I was to do it over again, I would start with:
1) the inner cowls - remove them completely and secure the outer tupperware to the headlight cowl with a zip tie on each side to keep it rigid and tight.
2) Good riding pants and helmet - I am cooler in my convertible pants (liners, rain liners, outer covers, mesh base) either with covers or mesh over my jeans than I am in jeans alone. Jeans alone are always hot and not really safe. I've also tried sweat pants and others under the riding pants but jeans under the mesh has always been coolest. On super hot days, wet the legs of the jeans and let evaporative cooling work to keep you cooler. I purchased my Shoei X-11 mainly because of the reported ventilation in this helmet. At the time, I wanted another Shoei and the choice was for the maximum cooling airflow for my hot head. Works great, lots of airflow.
3) Mylar bubble wrap helped a good bit but once the lower fuel tank heats the gas, the top tank still gets hot due to the fuel coming back in from the return line. It is a cheap enough fix to be worthy to be done as it does help.
4) Dropping the windshield lower than stock has increased my airflow and keeps me coolest. This really helps on the hottest of days. Of course this only works while I'm in motion.
5)Keep the side bags on the bike. I notice more heat when I take the side bags off of the bike.
6) I still plan to sync my throttle bodies to see if this will help. Some have reported that it has helped the heat issues.
7) I won't even consider wrapping any part of the exhaust. To me, that is just asking for rust and replacement - a costly way to go.
