Okay, I had a look at my chain today, and there is HEAPS of slack, easily 40mm, this seems odd as I bought it from a shop and they said they had tightened it. I've had the bike for 3 weeks perhaps and have done 800km or so. Do I really need to adjust the chain so frequently? How do I know when I need a new chain? Just until it is fully extened at the rear wheel and is still too loose? Also, I need a new cam chain as the bike is consistantly rattling on the right side whether hot or cold, now, if I know it needs to be done, how long would you think I would be able to give it before it might become a problem? I travel 400km a week and I'd hate for it to do any real damage cause I can't get to it for a few weeks. Any suggestions or tips on these issues would be great.