I bought a second-hand bicycle two weeks ago. Everything seemed to work like a charm; smooth rides; no noises whatsoever. However, lately I decided to oil it. I think that I put excessive amounts of oil in the cassette and derailleur. I used Liqui Moly 1613 MoS2-Rust Remover.
Right after the lubrication, the bike started to make a random noise while coasting. The noise is random, it doesn't appear periodically, but it is there and it kicks in let's say several times in a 1 minute span. It sounds like cracking joints (bones), but a little bit more intense and sharper. Nonetheless, the ride was still smooth.
I didn't have the chance to ride it again after the first trial after the lubrication.
I hope you can give me some insights regarding the possible problems my bike might have. Can it be just because of the excessive lubrication? Is there any risk if I continue riding it like that, given that the ride seems super smooth still?
I rode the bike after I came back from vacations, and the noise is not present anymore :).