Yeah, I could've worded that a little better. My coolant temp light came on several weeks ago (first time ever), so when I took the tank off the next day to check the fluid level, the coolant was low. Dummy me didn't bother looking at the reserve tank before putting more coolant in. A few days later, temp light comes on again. Check the level again under the tank the next day, and it's low. BTW, both times there were no visible leaks anywhere (puddle under bike, weep hole for the water pump). So this second time, I got under and checked the reserve tank and it was completely full. Doing some research on this, most were saying it's the radiator cap not holding pressure to bring the coolant back up when the engine cools down. We'll see how it does when I get back out and ride the bike for awhile.Huh, how did you determine you where losing fluid while being sucked back into radiator? Or is it not flowing back to the radiator?