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AZ Dave

YZ400 with 426 kit, jetting ?

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So here's my question, I read through the jetting database for both the 400 and 426 and nothing addressed the 426 with the 400 carb. The stock main jet for the 400 is a 175 main according to the database, and the bike has a 188 main it it now, it feels a little pudgy up top and I was thinking a 188 main is just way too huge. So is there anyone else out there with a 426 running a 400 carb? If so, what's your setup?

Thanks!!

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