Just thought i would pass on this info . I have been looking for a 16 tooth front for my Tenere but you cant get one . The 660R one does not fit as the Ten has a different spline , and you cant get a smaller rear either . But i have found a company called Powerlinks who are making me a 42 tooth one for the rear . They have quoted me under �50 . I found them in Motor Cycle News . You can email them at info@powerlinks.co.uk .