Be careful when applying brute force! Seldom the best way for something to be MADE to fit. When I received Corbin's first effort for my 05 Sprint, the seat pan actually sat on top of the bodywork at the rear of the seat. Brute force would have damaged my bike. The second effort was better but still did not fit correctly. They finally admitted that they would have to re-design the seat pan. My suggestion would be that if the seat does not fit correctly, return it to Corbin. Be prepared for a nightmare dealing with their customer service team though.