i would just order mikuni jets from a local shop, just going a couple of sizes up, find which one works best and sell the others.
i am currently using a dynojet kit in my YFZ and ive gotta say it is the biggest pain in the ass to fine tune, its unbelievable. ive tried the settings that come with the kit, settings my exhaust mfg. gave to me. couldnt get a single one to work.
just tryin to save another person from spending $50 on that damn thing.