Update: Seemed to be four stroking at anything over 25mph. Up until then, it was great, low end was solid. Cleaned the carb and air filter. Put it back on and it did the same thing. Going to get a new carb soon to replace the stock gurtner so I decided to put a small hole in the air filter box to give it a little more air. Now it's no longer four stroking and is hitting 35mph easy. But now, my low end sucks. Takes it's time to speed up. I'm assuming that it is running a little lean at lower rpms and great at higher rpms. Should I bother fucking with it more or just wait until I order a carb?