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jetting for xr 440

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I just installed a 440 kit and stage 1 hot cam in my xr400. It has the stock exhaust with tip removed and snorkle removed from air box. I have a mikuni pumper carb with 130 main and 15 pilot. I live at sea level. Any suggestions for jetting with these upgrades.

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hi i know you where asking a question on jetting but i was wondering if you solved your problem because i 2 have just biult an xr 440 with a mikuni but it is backfireing running lean could you tell me wat jets you used please! Thanks Richiee

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