thanks for the replies...I just got back from riding at Durhamtown Plantation in Georgia...great place, 4th time there in 4 years!.....ended up with 410 main, 42 pilot, 2.5 turns on the a.s., stock needle and went back to 3rd clip, is ran pretty good but I think I need the next leaner needle(raising the clip seemed a little too lean?)....and after leaning it out this much I went back to a br9eg plug....and as far as the Mikuni jets, I should have specified that the mains are the same but they changed the pilots :coocoo: ...now they use the same numbers as a Keihin, 42, 45, 50, etc.....-Hammy