Things to look for on my 14 1k??

So I purchased this machine back in april with 200 miles on it, and it has been flawless just like our 800s.. now that I’ve got about 1500mi on it, is there any valve adjustment that needs done,or any other engine issues? Clutches.. what’s their life expectancy, before needing gone through? Any 15 or 16 updates I should do? Notice it does not like moving slow in hi and tends to slip the belt… I’d like to think the 15 & up cover will fix it. I plan on tearing it down this winter, getting the suspension done and getting the cage done…..

Oh one more thing.. axles, we were at rush last weekend and I popped both fronts… what affordable axle should I go with?

Thank you
LANCE