There are a couple of different styles of black widow cans available for your bike. Their website does list some expensive universal but probably better to measure the exit port and buy universal ones of eBay.

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2011 xt660z.
Yoshimura cans ,kev mod,Dna 2, Stahlkoffer panniers,Hepco Becker box,Givi crash bars,Mita e07 tyres.