Smokin!

[JP400ex]

When I got my 400ex it would smoke (light blue) alot on startup but after warming up it would clear up. Everyone i talked to told me that was normal for the 400ex and it was probably the valve seals. So me and a buddy pulled the head and replaced the valve guide seals and put a new top end gasket kit on and it still does it. Im thinking i probably should have put a new set of rings on but the piston and rings in it isn't that old. maybe a year. What else could cause it to burn oil on start like that???

[k2-dawg]

My .02, you need rings.

[400Ex_Rida]

Originally posted by k2-dawg
My .02, you need rings.

Same here

[DEAL]

Its probably your valve seals.
Mine did it for awhile, then I adjusted my valves and I went away.
That may not work for yours , you might end up buying new seals.

[skemp]

Guides may be worn out too. New seals won't always fix it.

[Greg Z]

usally 400ex's have a TINT of blue in the white smoke just a TINT very little........... but once it gets seriouse it will be MORE blue then white and thats when you will need valve checks/new rings


but if its a tint iw ouldnt worry about it... change the oil to