I bought it from a guy that runs a small engine shop(i.e. lawn mowers, small cc scooters, dirtbikes) and it didnt have a big high end kick like it should and he told me to clean air filter(did and it gave higher speed) and chip off carbon residue on the muffler AND/OR piston. it was kind of a blur on what he actually said to clean so i thought i'd ride it a while(4 weeks, 1 mile a day and 10-20 miles a couple times) to break it in. few days ago i thought "Hmmm, i wonder what he said" so i took the engine apart, cleaned everything, used 2stroke oil to lube up things and put it back together. (im thinking i screwed up by putting on the oil :imo:) i tested the spark. it has a clean tip aswell. compression is good. the primer bubble doesnt expand after pushing it in. any answers would be helpful. i use this to get to work, school and across the city.

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