OK, so the bike is new to you, so you don't have history to go by.
Perhaps the clunk is not directly related to the new sprockets and chain, but maybe it is, or in concert with something else.
Therefore suggested is:
Check the end float of the front sprocket, noting there is supposed to be some.
Check the amount of play between the front sprocket and the shaft, noting that being a slip fit, means there has to be at least a hair of play.
Check the orientation of the front sprocket re on correctly or reversed.
Check the orientation of the rear sprocket re on correctly or reversed.
After aligning the rear wheel and adjusting the chain, visually eye the chain run for any obvious runout.
One could also use the Rob Tharlson Method of Rear Wheel Alignment re the sound check of the chain.
Check the cush drive.
Go from there.