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Message: [QUOTE="BIRDDOG, post: 262072, member: 27146"] I performed the bk mod to my 2000 yz426f.It seems fine , giving it gas when idling , but when i ride it, it stalls alot in throttle on off on situations. What main jet has anyone tried and worked out well. I only raised the needle 1 clip, the fuel spray is set around .50 sec, and the fuel does not hit the slide when the throttle is applied. I did not change the main. What size should i go to? Thanks [/QUOTE]