cold engine knock!

[charles]

05 400 ex .when cold at low idle have a knock.at warm idle nothing.engine is fine when warmed up at normal idle.have not had the first service but been told that it should not have this low knock.:confused:

[6858-400ex]

it is just nothing all the 400ex do it

[2004exrider]

uhhhhhh, mine doesnt:eek2: get it checked out