I have a 2000 Yamaha YZF 600R that needs a new chain and I´d like to do a chain and sprocket set with it. I know it has 47 teeth on the sprocket but am not sure how to distinguish which set is the best for the bike. I have a friend mechanic who will put it on for me cheap if i buy the set myself and I don´t want to go to a dealer to pay extra for something I myself can research and buy parts to. Can anyone give me a good word to how I distinguish the best set for this bike, thank you