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Message: [QUOTE="ftw666, post: 1050469, member: 68606"] have a 99 yz 250 and i keep fouling spark plugs i am running 40:1 mix brand new top end full bills pipe exhaust v force 3 reed cage main jet 165 went down from a 172 pilot jet 48 needle 1 click from full lean BR8ES/BR8EG sparkplugs i can be riding at any speed in any gear and the bike will just die on me and the plug is fouled i dont know what to do the plug is black and sootie and sometimes wet i have done some carb work but i dont know what else i can do [/QUOTE]