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400exridin121
05-03-2009, 12:49 PM
so i have an 03 400ex.

i live in indiana

i had a full sparks on it, and jetted it how i was told on here.
well recently my airbox shattered, and i decided it made more since to get a uni filter instead of new airbox.

without the airbox with stock filter it ran sluggish, especcialy at low rpms.

now with no airbox and a uni it runs alot better.

should i rejet to whatever the normal would be for these mods or leave it as it is.

thanks

rob_990
05-03-2009, 01:56 PM
sounds like it was to rich before and now its running betterr
does it backfire or bog at all?