[geezer]

im having a hard time following you, any abnormal noise is a bad thing, but the question is, is what your hearing abnormal? does it sound like a knock and only happen once right as the bike is starting? my bke does this and i never thought it was anything wrong. it will also make a similar noise if you dont slip the clutch enough taking off up a hill or with a heavy load. i think its fuel knock. but under those limited circumstances aint much you can do. am i in the ballpark?