Yeah, me too. I got stuck in traffic hell coming down I-70 and my temp light came on a few times. Never for more than a few seconds but still. The bike also spit coolant out if the overflow hose on the expansion tank. FYI, when that happens your boot gets wet and it burns a bit.
1998 KLR-650 (wrecked)
2000 KTM 950 Adventure (sold and regret it)
2001 KTM 640 Enduro/SuperMoto (sold, no regrets)
2008 Honda Shadow 750 Spirit
2011 Kawasaki Vulcan 1700 Vaquero