I've never had an issue with mine although I do keep an eye on it.


Have a look in the downloads section, download the parts manual for your bike an get a price off yamaha for a new one.

Harry.


Have you got any tools to do it yourself? I did mine in 30mins and that was removing the swingarm enough to fit the endless chain, it was made easier cause I keep on top of cleaning behind the sprocket cover and grease in the swingarm bearings. Its quite simple to do If you allow yourself some time if its your first try.


I picked up my genuine chain and sprockets for £130 off ebay(I think they are around £160 from a dealer), it came with a split link even though the chain was endless, I suppose to save you taking the swingarm off although you'd need to split the chain first.


Try pulling the clutch in to see if the knocking is still there when your riding, mine was there but was harder to spot with wind noise, etc. It was more noticeable under load of the engine though.


Also its a good time to fit the updated front sprocket nut with new washer if you haven't done so already, loads of info about this on the old site.


I wouldn't pay any more that £100 for a non genuine sprocket kit unless it was a renthal/tsubaki kit(although mine didn't last long so I wouldn't buy another)


Simon