Cb 900 bog

Custommike900

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Hi gang,
I have a stock 900 custom that i have been going over little by little. Im still having an issue witth it bogging under 3000 rpm. Over 3000 grand it rips but not so good at take off and up to 3 range tank screen clean, carbs clean down to the tiny orifices in the throat, no vac leaks, new boots, stock air box, carbs all in sync, electric all checked out was going to try bypass vacuum fuel shut off, maybe recheck valve clearances 21000 miles??? Starts fine Idles fine
 
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