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Mikuni TM42-6 flatside pumper jetting question

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  I recently purchased a brand new XR650L. I have already de-snorkeled and de-smogged it, have a K&N air filter, powerbomb header and FMF Q4 Exhaust.  Also installed is a stage 1 dynojet kit.  It works great but I find myself craving a more responsive ride so I have decided to upgrade my carb to the Mikuni TM42-6 flatside pumper.  Its hard to find a good source on proper jetting for this application.  The distributor I ordered it from says it comes "mostly" tuned for my application.  Anyone have any advice on what jetting works best for this setup? Is there any other upgrades that you would consider essential to compliment the higher performance carburetor?  I'm pretty new to all this and will appreciate any advice you guys have to offer

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