valves ticking i think

were you careful to get the middle valves adjusted correctly-- there are 2 intake or exhaust valves next to each other-- make sure that you put the correct adjustment on them-- this can cause a wheezing-- if the valves are correct your engine should have quieted down & smoothed out.

next step is to check for gasket leaks around the carb /intalke /exhaust manifold attaching area-- spray carb cleaner at selective points to see if engine speed changes-- if so you have a leak.

if no leaks --spray carb cleaner liberally in carb -- when it looks clean-- adjust said carb to the highest idle you can get(vacuum gauge would be best-- but ear should get you close.)--

there is more but see what that gets you.

Lawrence