i got my kit with the cent clutch pre installed. I dont recommend the preinstall cause they dont know what thread locker is. a screw came loose and was tapping the backside of the clutch bell. once i found something to pull the clutch... and put it back together, with 3 gaskets this time, and a gasket i made from cardboard, for the smaller clutch cover, and it ran fine and quieter. rough riding broke the gear off the clutch bell, and had to replace it but still worth it. also i would pay a bit more for the all metal pull start.
with a cent clutch installed you could install a freewheel sprocket on the rear. so when you petal there would be less/no resistance on the drive train. spooky tooth has a nice freewheel/hub adapter/rim for like 130 bucks. im definitely installing that beast.