Join Date: Jun 2010
Location: Killeen, TX
Year/Make/Model: 2013 Vulcan Nomad
I have ridden in temps over 105 for hours (last summer was a scorcher).
Before the ride begins, drink lots of water, then drink more, then some more.
During the ride, keep the bike moving. Keep an eye on your buddies for signs of heat exhaustion, have them do the same for you.
As previously stated, use long sleeves, sun-block, mesh, and more water. I have not tried a cooling vest, but it sounds like a good idea. Have fun!
1SG, USA (Retired)