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Discussion Starter · #1 ·
how the hell do you adjust the the air fuel screw? Its shaped like a ( D ) wth ?
 

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What are we working on? my air fuel screw is a slotted screwdriver yours may be whats called a clutch bit alot of the older Quadrajets had them as well as Holleys
 

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What are we working on? my air fuel screw is a slotted screwdriver yours may be whats called a clutch bit alot of the older Quadrajets had them as well as Holleys
Yeah, either that, or it was a slotted and one side of it broke off.
 

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theres a special tool.i just got one its about a foot long.it kind of sucks cant really tell if its turning the screw.ill put a pic up later it was 30 bucks from honda dealer.
 

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Discussion Starter · #5 ·
well that kinda sucks I wonder if I can use one from an older 400ex? mine is an 07.
 

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The air mixture screw on our 06 TRX90 has that D shaped head. I managed to remove it with a small slotted screwdriver after which I cut a slot in the head with a Dremel tool.
 
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