Hi i have just bought my son a early yamaha pw 50 but i cant get it to start ! i put a new spark plug in it and new fuel, i cleaned out all carb and blew out jets ! its giving a good clear spark but just drowning the plug with fuel weather the choke is on or off ! my poor little 6 year old son is so upset he just wants to ride it ! can any one help cheers Steve p.s also i noticed under seat a red wire from handle bar switch is broken also there is white wire with red trace not plugged into anything but bike still sparks ???????????