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bogging yzf400

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ok i have a yzf400 and it bogs and cut outs real bad when i first hit the throttle if i feather it runs ok... it has a fcr carb by sudco and i have no idea what to do or how too... since i am new to thumpers... wanted to know what you guys think i should do... i have a freind say it is prolly lean and thats why it bogs.... if this is so what do i change....????

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Is the carburetor a replacement from Sudco? The FCR is normally stock.

Try turning out the idle mixture screw and see if a richer clip position helps.

When the needle is out, check the needle code stamped on it and post the code and clip position.

It would help to know the-

pilot jet

fuel screw setting

needle code

clip position

main jet

(Does it have an air screw in the intake bell or air jets only - #100 & #200 )

The settings will become much more clear with this information.

James

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so how do i get the needle out just take off the top like normal carb??? also where is the idle mixture screw on this carb???? i did idle it down andseen on here it needs to idle fast ..so should i idle it back up???

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