Hi, just bought my first bike a 1989 GSXR 400 so i got a few questions for the pros out there. The bike is in awesome condition and i want to keep it that way. Any suggestions in doing so? Couple questions concering, tires i heard should be check all the time, but how do i know what is the right pressure for my bike? Oil, i know since i haven't ride it at all over the winter i should change the oil, what brand should i get? Since iam new at this, i should bring it in to a bike shop for an oil change right?? Thanks for answering my questions and concerns.