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View Full Version : 400ex carb difference!!!!!



mod300ex
04-20-2003, 01:48 PM
i got a 400ex carb w/ a kNn jet kit on a 300ex it made a top end difference and it fells like it kinda(KINDA)has a powerband and lost low and gained alot of top ......what kinda power gains did u guys fell when u did this mod

Houser Cannondale
04-20-2003, 03:23 PM
what jets are you running in the carb?

mod300ex
04-21-2003, 08:40 AM
im not sure my brother did the jettin i belive its a 170 main i think thats what he said

UglyMotha™
04-21-2003, 08:56 AM
that's awfully large main for a 300ex

RideRed400StYlE
04-21-2003, 09:28 AM
holy big main jet batman.. I would cut that thing down a little bit on your 300ex. I dont know though if it was a jet kit sometims the numbers run different than stock keihn jets??

mod300ex
04-21-2003, 09:38 AM
what size do u gusy have on ur 400ex cuz its a 400ex carb??????its a KNN jet kit to

UglyMotha™
04-21-2003, 11:27 AM
i'm running a 165 with somewhat heavy motor mods and i'm still a tad to rich

toby400ex
04-21-2003, 11:51 AM
i thought you were supposed to run like a 150 or lower with that carb on the 300ex:eek: