400ex issues
Mar 28, 2005 | 11:19 PM
#1
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Weekend Warrior
Joined: Mar 2005
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400ex issues
i recently bought a 2001 400ex with white bros pipe k&n filter rev box and no airbox lid it ran great for about ten hours then started bogging off idle and popping when slowing down to me it is lean but i dont know why it would run fine then not. the plug looks fine and i cleaned the filter i am lost now i would greatly appreciate any help with this
Mar 29, 2005 | 10:54 AM
#4
T Rex Rider
What irritates me is!
Those 6-packs work pretty good.
What irritates me is!
Those 6-packs work pretty good.
Joined: Jun 2003
Posts: 16,801
Likes: 1
From: Oeste Del Tejas
400ex issues
Be sure to inspect your K&N for tears and make sure it's on tight, check your intake boots for cracks and for a loose head pipe.
Put fresh fuel in. I would change the plug anyway then move to jetting if the others don't solve the problem.
Unless the plug was light grey/white?
Put fresh fuel in. I would change the plug anyway then move to jetting if the others don't solve the problem.
Unless the plug was light grey/white?
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