Hi all, I noticed this just started happening today. Basically whenever I shift from 1st to 2nd and 3rd to 4th my bike makes a clunking noise. My bike has about ~400 miles on it and I have not done a first service or anything to it yet. Is this something that can be fixed with an oil change or something along those lines? The noise is definitely a lot different from what I'm used to when shifting and i'm kind of concerned.