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WR450F off idle transition too abrupt.

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My '04 WR450F runs good and clean everywhere except just off idle. It seems to me it's a bit abrupt and makes it hard to ride slow. I'm looking for that real smooth transition from idle to power. I have the TPS disconnected and the little o-ring in the ACV replaced with a plug. Better but still not good enough. I have tried adjusting the fuel screw from closed to all out without much help.

Anyone solved this or must I live with it?

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