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CRF250R Idle toruble

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I'm having trouble with setting the idle. When the back is warmed up i set the idle with the idle crew and the fuel screw. By doing this i get perfect response. After hard riding for about 20 min the idle goes up. After i reset and another 20 min same thing.

Stock jetting

VP U-4

TM extande fuel screw 2 turns out.

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