Hello! I’m a beginner rider that just purchased a 1999 ninja 500 a month ago. The guy I bought it from put brand new tires on it, had the break fluid and coolant flushed, and lubed the cables before he sold it. I got it and changed the oil then put about 400 miles on it. I don’t know the last time it’s had a valve adjustment, but I don’t have any reason to think the valves need it, just wondering if I should bite the bullet and do the adjustment or wait till the next interval. It has 8600 miles on it currently. I’ve had some minor experience with working on motorcycles before, but I’m always kinda nervous about messing something up, so I’m apprehensive about doing the valve adjustment myself. Any help is appreciated!