Jenny I have checked both the XTX/XTR Parts Manual and the XTZ Tenere and found that the part number for the cush drive rubbers is exactly the same on all 3 bikes.

The part number is in facts 5Y1-25364-00 DAMPER
Now I am sure that the hub that these rubbers fits in is the same on all 3 bikes and that there is no other Yamaha model that uses this hub, for example if you look at a Fazer 600 you'll see they have a complete different setup compared to the XT wheels hubs & rimsets which are spoked.

A full set of cush drive rubbers would cost about �18 ex vat. But if you read the thread below you will find some tips from Kev on alternative methods to regenerate / refurb the existing rubbers with either strips of converyor belt or inner tubes, see what you think.

http://www.xt660.com/showthread.php?t=4042&highlight=cush+drive