Never had a seat off a 2005 older vector but Apex you go in at the rear exhaust cups & just follow your nose from there then the seat pulls off from 2 nylon seat tabs on each side front end of seat that latch seat in place to chassis. May need to remove decorative gas tank shield to have full acess but that is follow your nose too. Fit & finish on Yamaha sleds is very good so everything lines up goes back together easily. Should not take more than 15 minutes. If replacing donuts gas tank has to come out too? What are you fixing?