I raced the Wild Horse national enduro yesterday when i noticed a sound (kinda like a chain slipping around a sprocket) only when the terrain was extremely technical and i was feathering the clutch a lot in first gear with a lot of gas. Wide open it seemed fine and i didnt notice any slipping or noise in any gear. It is not the chain and sprockets because they were brand new and the slack adjusted correctly. I can only think it is the clutch because i have never changed it before. I thought that you would only feel the clutch slip and not hear any noises when the clutch is fried. Any advice would be appreciated. Oh ya is a 2000 YZ426.