Katana Owners Club U.K.

yes, the sysems from each bike will fit the other, 750/1000/1100, the only difference being that the 1100 silencers have bigger holes in the end due to the bigger engines flowing more gas, so if you want it to look stock then a 750 system will fit on an 1100, however, 750 silencers may possibly strangle the performance of an 1100, cant say by how much though.

7.5 stock downpipes have smaller inner diameters than 1100. Aftermarket systems tend to use the same dias for both though...