I am 1 helpless man from Norway I HAVE A Problem,My yz125 will not go!(It`s not mine It`s my son`s) The sparkplug seams to be `wet`of gas,it start when the plug is dry,but when I touch the trotle it stop,and when I look at the sparkplug it is whet of gas,what is the problem,I did find a hole in the carburator where the idle adjustments screw should be,and it was replased,but it was no differense,can anybody help me pleas!!!there must be a whay of adjust the carburator ??