You're at the border of possibly having some clogging with 1600 miles. Especially the older 2-stroke oils did this commonly.
Remove the exhaust,check the exhaust port on the cylinder, and the exhaust for needing to be decarbonized.
After also checking that the rings aren't stuck, by checking the compression, it wouldn't hurt,either to take .020" off the head for higher compression. That's what I'd be doing,anyway. don-ohio (:^)