I have a 2024, 850 Khaos with a Carls 900 BB, Carls 900 Pipe, Carls Tune along with a BBA clutch kit. Obviously the sled also came with the P-85 clutch which in my mind is also plus. I don't have but a few miles on from late last season but so far it's been great. This year it is now stretched to a 165 with Ice Age Rails, a new 300LX track, and all new Fox Air Shocks, so I'm excited to see how this comes together.
Honestly, just do what you want you can't really make a wrong decision ...............as everyone knows, sleds are not investments so no matter what, it costs money and you loose money! But it sure is fun doing it!! LOL