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anyone familiar with doing a valve adjustment on a 2004 honda 400ex? just trying to figure out how difficult or easy it may be?
It is pretty easy on that machine. Have you ever done a valve adjustment before?
If you have never done them it can intimidating, but they are simple tappet style valve adjusters. Find someone to give you a hand and it shouldn't take more than 2 hours even on your first time doing them. then next time you need to do them you are looking at about a hour to do them.
A little advice, wash the machine first. Last thing you want is dirt to fall into the top end. Yes, it's just a coupla caps you take off but still, not a bad idea to wash first.