I just got a 04 400ex. Its sweet. Im going to be taking it for the break-in maintence. Dont feel like bothering with valves. My question is after that do i have to take it in for regular maintence? Do the valves and other things need to be adjusted?

 

you shouldnt have to do too much maintence on it, i have a bunch of buddy with 400exs, and they dont do anything except oil changes. But of course,just like anything, theres gonna be occasinal things that will need to be fixed, but usually nothing major.

 

there isn't much to do change oil adjust chain and check air in the tires. wash it that should about do it

 

dont forget to clean the air filter and change your plug every once and a while

 

after break in will anything internaly need to be adjusted? like the valves? After break in maintence do you guys every bring quad back for maintence service?

 

valves every 50 hours or so,,,and the stuff everyone else said

400ex is as simple as it gets

 

might want to lube the chain every now and then

 

how can you tell if the valves need to be adjusted?

 

any help?

 

Power loss and excessive clattering from the head.