25-10-11, 09:20 PM
Here is a photo of an original equipment sprocket for the FZS600.
![[Image: 2008_1001FZS600SprocketNut0002.jpg]](http://i306.photobucket.com/albums/nn275/limax2/2008_1001FZS600SprocketNut0002.jpg)
The brown plastic stuff is only on Yamaha sprockets (and has been cut away a bit on this one just to show the construction). It won't be on after market sprockets and is nothing to worry about. I'm guessing the Z-13 shown refers to the number of teeth, which at 13 is correct. What makes you think you need one with 22 teeth? A quick measurment of an old sprocket also corresponds to the dimensions on your drawing picture. I've not heard of this problem before but if it looks like it will nearly fit it could be a slight manufacturing error. They should be a fairly close fit and it wouldn't take much error for it not to fit.
If it is obviously way out then it is the wrong sprocket for your bike. The thing that makes me think that may be the case is the two tapped holes. A system used by some Honda models, and maybe others, utilises two such holes.
If it is obviously different to your old sprocket you could take your old sprocket to the shop and see what they say then. Good luck and let us know when you solve this.
The brown plastic stuff is only on Yamaha sprockets (and has been cut away a bit on this one just to show the construction). It won't be on after market sprockets and is nothing to worry about. I'm guessing the Z-13 shown refers to the number of teeth, which at 13 is correct. What makes you think you need one with 22 teeth? A quick measurment of an old sprocket also corresponds to the dimensions on your drawing picture. I've not heard of this problem before but if it looks like it will nearly fit it could be a slight manufacturing error. They should be a fairly close fit and it wouldn't take much error for it not to fit.
If it is obviously way out then it is the wrong sprocket for your bike. The thing that makes me think that may be the case is the two tapped holes. A system used by some Honda models, and maybe others, utilises two such holes.
If it is obviously different to your old sprocket you could take your old sprocket to the shop and see what they say then. Good luck and let us know when you solve this.