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Dirt Bike Brands - Other
99 WR400 with 01 WR426 Carb (FCR gen2) Help!
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[QUOTE="SFO, post: 1266411, member: 21864"] A properly jetted wr426 carb will work very good on a yz400 set up. Not sure what the needle of the day is anymore but most of the FCR carbs I have dealt with have me build the jetting around the needle selection. The needle is very sensitive and akin to changing cam timing IMHO. Running a 170 main sounds kinda weird. What needle do you have? My personal favorite was the EKP, albiet it has been a while... Regards, Bill [/QUOTE]
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Dirt Bike Brands - Other
99 WR400 with 01 WR426 Carb (FCR gen2) Help!
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