My dealer called and said that there is a recall on my 2018 z1000. He printed out all the info on it for me and cfmoto is calling it a warranty bulletin for the drive clutch nut replacement. What cfmoto engineers have found is the nut is too thick and the clutch bolt torque is being applied to the end of the nut and not directly on the fixed shaft which can cause it to loosen and cause clutch failure. It states that not all machines are affected the ones with a series 1 drive clutch are fine series 1 drive clutches have a machined variator cup. Series 2 drive clutches have a cast variator cup and the nut needs to be replaced. The warranty bulletin is WAR-2018-03 and the new nut part number is 0JYA-051013-10000.

This is about the nut

Thanks for the info