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2003honda400ex
01-11-2006, 06:56 PM
I have a 2003 with a full system white brothers pipe , white brothers rev box and a k&n filter. what would be the best main jet to run ?
JOEX
01-11-2006, 08:14 PM
If you're using Keihin jets a 150 or 152 should be close, possibly a 155.