Just bought a used 170, smokes, looking at big bore

So I bought a used RZR 170 from a buddy, it sat for about a year and was fine when parked, went to get it and it started smoking like crazy. Looking a different big bore kits and came across this:

Cylinder Set – Engine Parts – Street Scooters – PartsForScooters.com Store

Has anyone used this or know if it’s any good or will even work? It says it does but I just wanted to more input on it. My plan was to get that and these:

180cc Cylinder Head – Engine Parts – Street Scooters – PartsForScooters.com Store

Mikuni VM26 Performance Carburetor – Air & Fuel – Pocket Bikes, Dirt Bikes & ATVs – PartsForScooters.com Store

I’m not sure about the carb or if I even need it. Could I just use the factory carb? We have a factory airbox and exhaust and I do not plan on changing it yet