Got to ride a friends 02 cr134,fresh.Stock jetting was way lean,lack of brass held me with a 55 pilot and 460 main. The plug says the main could drop 2 sizes and riding says the pilot needs to go up one more.May call jd about some multi taper needles,heat range looks to go to an 8. Now the good part,the previous owner has grooved the entire intake tract,like 6 ,1/8 inch deep in a slow spiral,well isn't this inventive! Well he says it ran good before,I am saying put it in the recycle barrel! Eric does some sweet work,I jumped on a 06 yz 125 and an 05 crf250 and was much happier on the 134 with a sluggish bottom! There ought to be a law preventing certain people from buying tools! And the firepower could use a couple oz's of boost for 5 gallons!