Parting out a 08, have questions

[Twostroke]

So I'm parting out a 08 dragon 800 155". Been getting questions asking if certain parts will fit different year IQs. So I'll be asking a bunch of questions..first one

What year did they go to the splined & team secondary? And are all the splined secondarys interchangeable?

Same with the primary, is it a "p85'?

Pardon my iqnorance...