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View Full Version : 400EX bogs at WOT stab from idle



SoonerYFZ
05-12-2004, 08:42 PM
Is it normal for a 400ex to bog if you stab the throttle to WOT from idle? I am helping a friend get his 400EX jetted and I'm just wondering if we have the jetting right. It seems to be right on everywhere else... you can stab it to WOT from a 1/4 throttle with no problem. It revs right up gradually and it sustains at any rpm level.

He is running a full big gun exhaust with K&N filter (no lid) and a 158 main jet.

SoonerYFZ
05-12-2004, 08:48 PM
Guess I should have scrolled down... found a nearly identical thread on the first page a bit lower... sorry for the repost.