Chains

[nmabbott]

Currently running a DID O-ring Gold. It's definetly time to replace my rear sproket,front looks OK, how can you tell when it's time to replace the chain?

[Shawn_Mc]

Change the front too. Usually only 15 bucks, save your new chain. I usually doit like this, if I can pull the chain off the back of the sprocket more than about 1/4 inch or 30-40% of the roller diameter with the chain properly adjusted, its time to replace. Doing this little test on a new chain and sprocket will only give ya about 1/16 of movement

[ldan]

If you look in the owners manual, it gives you a measurement for chain wear. I'm not sure if it applies to all chains. I would agree as to changing all as a set, at least the sprockets.

[FASTFRANK]

Just performed the BK mod and checked my valves, also replaced sprockets and chain. The sprockets were fine and in good shape but the stock chain was shot. So I replaced with renthal stock gearing sprocket kit, and an EK X-ring blue chain, I will keep this forum posted as to how they wear. Chain was rather expensive but I have one on my ZX-9r and only adjusted it once after it broke in. With that power-house (140HP) I think that the chain on the YZF will do good. The extra money for a good chain will be worth it I hope. Frank