Yes, as Alex says, check coolant level -- should be between high and low marks on the overflow tank. There is a slot on the left skirt to view it through but as he says, easier to look right down in the tank. The whole rubber footrest pad comes right off by pulling. Then you'll see the screw. Add only non-silicate antifreeze or distilled water if needed. I use Prestone 50/50.
Other than that, the tire pressures is about all I can think of for now. I run just a tad under the max inflation since I never carry a maximum load and I only weigh 134 pounds.