Just broke in my 66cc china girl. It's got a bike berry hp carb and I'm wondering what size jet to get. I dont know if the bigger number the jet the smaller hole or the other way around. Its 4 stroking at 1/2 to WOT and getting wayyyyy to much fuel. The plug is black. Half throttle is faster than WOT right now. I think the stock jet size in the hp carb is .70 and just wondering what size jet I should get. My altitude is around 400ft and average temp is usually around 70-80. People are saying to run a .90 size jet? I dont know if that is a bigger or smaller hole.