Hello, I recently bought a 07 Honda rancher 420 4×4 and I noticed there is a rattling sound whenever it revs up. I’m assuming that It is the valves and not the timing change. Iv never done any moter work before and was wondering if there is any tips or tricks I should know before tacking this new project. From what I heard it is not hard to do. Any help y’all can provide would be greatly appreciated. Thanks