Just joined the forum and have been looking around and wanted to get your opnion. Just got a 2002 YZF250 and I do not have any history on the bike. I changed the oil as well as flushed and re-filled the cooling system as well as put a new air filter in. Bike seems to run good as well as starts pretty well "onec you figure out the art of that". My question is just ride it till I have a problem? or is there engine wook that I need to do? Just ride the trails in the national forest OHV.