The seats of all early red framed models V11 models are exactly the same. At least that's what the parts manual sais. Don't know for the later black framed models. As far as I can remember Corbin seats don't use the OEM cowling. Another option is Rich Maund Cycle Upholstery; he does a damn good seat conversion and can make it exactly how you want it. Higher, lower, softer, smaller, wider, you decide. He used to ride a V11 and I believe he is still a forum member. He's in Cheaspeake VA. Google his contact details.