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I Put A #42 Pilot Jet In My Stock '05 400ex And Turned The Fuel Screw Out Another 3/4 Turns. ( I Believe Stock Is 2 1/4 Turns Out).

I Am Absolutely Positive That Nothing Else Was Touched And It Was Put Back Together Correctly. This Was From The Tt Thread. I Rode The Bike At Sea Level In 45 Degree Weather. The Bike Starts Fine Now ( No Hard Starting ) But It Still Doesn't Idle Good. As I Was Riding It Anything Above 1/4 Throttle It Was Sputtering And Bogging As I Increased The Throttle. It Actually Ran Better With The Choke On The First Position But Still Sputtered And Bogged Above 1/4/ Throttle, I Don't Know If It Was Flooding Or Starving For Gas. I Went Home And Put The Fuel Screw Back To Stock And I Will Try It With Just The #42 Pilot Jet. Anyone Ever Have This Problem.

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