Hi,
I have a new 2005 yz 125 that I ride trail on and when i put a new plug in it runs good but after i stop for an hour or less it well start back and and ride for about 20ft and then "pop pop pop" It fouls when i pull the plug it is wet and dark.. ill be lucky if i can go a day without fouling one.. im 15 and live in eastern kentucky and i mix at 32:1 with yamalube 2 cycle racing oil so what do i need to do?
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fouling plugs
Im not sure what to do but if its still under warranty why don't you take it back and see what they say.
Fouling plugs
try mixing at 40:1