As the manifacture, I can tell you it fits all 1100 and 1150 GS's Except for the 1150GSA if you want to keep the original crash bars, remove the crash bars and it will work with the GSA, we make a different mount for the GSA
Jay G DMC sidecars
866-638-1793
www.dmcsidecars.com
Monday - Thursday 6-4:30
As the manifacture, I can tell you it fits all 1100 and 1150 GS's Except for the 1150GSA if you want to keep the original crash bars, remove the crash bars and it will work with the GSA, we make a different mount for the GSA