Hello, I was wondering if anyone could help me figure this out. When I was riding my 1999 ZR 600 this weekend, it started to make a buzzing noise that was noticeable when I kept the sled moving at a steady pace. Its hard to explain the sound, but this is the best way i could think of: It sounds like if you put a leaf in a fan, it just like buzzes faster and faster as the speed increases. My only guess would be the chain oil may be low? I checked it before I left and it was perfect, but now the sled is up north waiting for next weekend but i want to try and fix it before i ride if it is a serious problem. Any ideas on what it may be or how to fix it? thanks!