got some questions about a 2000 polaris trailblazer 250

[kawasakimojaverider]

1.how hard is it to change a counter shaft on one is it something the average joe could do?
2. is the polaris 400 sport and the trailblazer 250 tranny parts the same?
3.does anybody know somebody that could replace it for me cheaply and that live in the central florida area?