So today I was changing the oil on my VTR250. It was the first time I had attempted this, but it all seemed very simple, besides getting that soft metal washer off the sump plug that had been squished onto the threads. Anyway... I put a new oil filter in, holding the part with paper towel. Afterwards I noticed a small greenish-blue stain on the paper towel (less than five cent piece sized). Figured it was probably coolant and checked over the bike (I am a complete mechanical noob). I wiped around the bike with some white paper towel, and discovered about a droplet of coolant on what I believe is the water pump cover (left hand side of the bike... a thick hose from the radiator connects to it). I am pretty sure that the coolant wouldn't have come from anywhere else than this cover. All the hoses seemed intact, and it was only about another droplet that I discovered with paper towel. I had wiped over the hoses and about the other parts of the bike with paper towel looking for a leak. Checked the reservoir and the coolant level was normal. I can't remember what it was last time I checked, but it was near the upper limit this time. Is one droplet of coolant maybe a harbinger of doom? Could my bike suddenly loose all of its coolant very suddenly? By the way, if using white paper towel to show up coloured liquids is not a commonly used technique... it seems to work very well! I am just wondering, how urgent does this need to be fixed (eg. should I not ride the bike at all before getting it seen to) and are there some simple things that I could possibly do to fix it myself?