Ok T.Talkers, need some input here. Y2K WR 400FM with these mods:WR timing,grey wire disconnected and insulated, airbox lid on but have drilled 1/2" holes(3)down center for more airflow(water crossing paranoia warrants the keeping of the lid ),stock exhaust w/baffle on (til my Vortip isn't back-ordered from Fineline),throttle limiter cut to YZF spec.,13 tooth counter,170MJ, DVP@#4 clip setting,45PJ and pilot screw @1.25-1.5 turns. I've tried every fix in the forum to get rid of the idle-1/8 throttle stumble(pilot screw settings,DRS needle replacement with a DVP, clip position settings, accelerator pump linkage adjustment, checked for air leaks at manifold and hot start,etc) but nothing seems to solve the problem ? This problem is more noticeable on the workstand while blipping the throttle quickly and will even kill the bike if I wick the throttle to WFO, than it is under load while riding but it definitely hesitates under load as well, usually when I need to bump the front over a big log or rock! Do any of you TTer's have any other remedies that I have overlooked? Any help would be appreciated, since I have a lot invested in this Blue bike and am considering the tallest cliff I can find or a CR450F to solve the problem!