I just got back from a trip to baja, in which we did about 1700 miles of riding. I took a new-to-me 650R, which I purchased to replace my 01 that had a bit over 20k miles. The replacement bike was purchased used, but with very few miles. Anyway, it consumed a fair amount of coolant- I routinely had to fill the overflow bottle in the morning, and sometimes, it needed a little in the radiators as well. Bike runs perfectly, doesn't seem to leak anything, and has no smell of coolant. It consumed no oil in 1700 miles and it actually still looks pretty clear. The previous owner had run Evans- I drained it and went back to stock honda coolant. My old XR never used a drop of coolant in all the time i had it, so this was a little surprising to me. I plan to race this bike in the 500, so if I need to tear into it, the time is now. Anyone have an idea where to start? I thought I'd pull the water pump apart to see if there was a chance that coolant was sneaking past a seal there... the bike has never boiled (with me on it, anyway) and has a 1.6 cap already installed. Thanks in advance for any help.