OK here we go. After i put a new sparklug in i ride about two rides and then my bike starts running wierd. loud poping and what not and not much get up and go. So i check my plug and it is all sooty and black. i changed the plug and it goes fine for a few more rides. It hasnt done this before but i did put on a new pipe this winter. All the riding i have dont with the new pipe is great till it the weather started warming up. I am at 2500 feet and ride up to 5000'. My jetting is 170, 45, needle 3rd position. I am assuming that wiht the blackness of my plug i am running rich. Or is there something i am doing wrong. Do i meed to go leaner on the main or what. thanks guys . I tried a search but i didnt find what i needed. Thanks.