I believe in one of your previous post you stated the problems you were having and one of the replies you got was about the major elevation change from Hawaii to Washington. Did you ever rejet the bike yet? This sounds to me to be your culprit. You may also want to check your valve clearances.
2004 KFX400,Yoshi 450 bbk, drze kit, drz flywheel, CWR pro-cams, Crasko P&P, custom Yosh header with FMF PC4, FCR39, ESR intake, Leager A arms, GTT modded 450r shocks, GTT rear link, Tag stem & bars, LSR axle, YFZ450 front calipers
2000 Lakota 300, DG excellerator,400ex carb,JB custom intake,Crasko P&P head CWR 335 kit and 390 cam, 400ex rear hubs, kfx400 front suspension, JB custom rear swinger.
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