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Discussion Starter · #1 ·
I just put a hmf competition slip on k&n filter n modquad airflow system and a dynojet jet kit on my 07 400ex and my brother said I need a fuel mixture screw to easily adjust it. he told me this is what i need. but it dont fit my bike. Anything yal could tell me? BTW that stuff helped my bike ALOT!!!

Tusk Fuel Mixture Screw | Rocky Mountain ATV/MC
 

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What did your dynojet kit tell you to do? you're probably only going to turn it out about 1/2 turn more anyway. Don't waste your money.
 

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Discussion Starter · #3 ·
I have no clue about mechanics at all..my brother has had 2 racing 4wheelers and does EVERYTHING for me..
Idk what it said to do but i know he did what it told him but he said sumtimes it might be different on the fuel mixture screw.
While at idle it keeps shutting off.. and even when im driving it and i hold the clutch for a while without giving gas..
it kinda rocks the carb. its weird..
 

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Go up one size on the slow jet backi the air screw out 3 1/2 turns from seat
 

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were is the screew
 

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The air/fuel mixture screw is on the bottom of the carb in front of the carb bowl. It screws up into the bottom of the carb and is hard to see with the carb on the ATV.
 
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