My motorized bicycle is an 80cc kit off eBay and I've been having trouble with it ever since I got it and when I thought I finally fixed it now it has a complete loss of power after about 15 seconds meaning it's top speed is like 8 mph and it can't go up any hills to save its life not even small ones I tried replacing the cdi and the spark plug thinking it was an electrical problem but really there was still no change the old spark plug was so black I thought maybe it was burnt I hear this is carbon fouling and I'm trying to keep the new one from getting like and I've been told it was running too rich so I moved the c clip in the carb to the top peg and use gas at at 32:1 ratio and still no change after long rides the carb sometimes drips out a black hot liquid which I think is oil I just want to take it to a repair shop but we don't have any of those for these in New York (that I know of) and the weird part is it was working just fine the day before except for a flat tire I managed to make it home on since it was a slime tube that kept leaking air and had to be pumped up every couple minutes until it seated properly then the next day I go to ride it and this