The person that sold you the bike is a POS !!! I am not a mechanic and not sure if this will work ??? Run alittle diesel fuel mixed with Rotella 15w-40 to clean the engine out a few times . Don't ride the bike , just to flush the engine out . Get the engine hot , drain , clean the filter , and do it again. This should flush the engine from the plastic that is in the engine .I hope this helps !!!
IF NOT GO TO THE PERSON THAT SOLD YOU BIKE AND KICK HIM IN THE SACK!!!
