How to clean a cassette?
Is it ok to use petrol to clean away the gick from a cassette. I used to soak them overnight after scrubbing with a toothbrush when I was younger and can't remember if it damaged them. I think it would be ok but just wanted to make sure. Also there is a rivet on the Dura-ace chain that is different to the rest. I am guessing this is the one to remove to take the chain off. Would I be right?