View Full Version : Jetting help
t-balls400ex
07-03-2002, 07:24 AM
Recently bought a 1999 Honda 400ex has an E-series pipe and two 2 inch holes in airbox.The man I bought it from said his shop put a 170 main jet is this too big seems to run ok this is the only one I've rode.
tj's400ex
07-03-2002, 12:14 PM
seems big, check the spark plug, what is it telling you? if the plug looks good I would check the jet to confirm the size.
that's what I would do. :)
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