... certificate 2) 2 stroke engine 3) Speed: 30km/hour 4) Minimum order:60 sets 48cc black gas bicycle engineMain parameter:Size:42 ... /40, 10W/30 machine oil)Mixing ratio of fuel and engine oil16:1 for new sets, 20:1 after running 500kmSparking ... America, Australia, Africa, South Asia,Canada and Russia. 48cc black gas bicyle engine