04 yz450f vibration issues

I just rebuild a yz450f.   full motor has been gone through, new crank, seals ,cyl, piston, and a complete head rebuild w/ new valves springs ect ect.


I've run it on the ice a couple times since rebuilding, but the vibration is crazy.    puts my hands to sleep anytime I get high into the revs.   I've never owned a 450, but I don't remember my 450 quad or any other dirt bike ive ridden to vibrate this much.


Are the 04 450's known for their vibration?


balancer is correctly aligned.    stock handlebar set up from what I can tell.

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