400ex

[gizmo347]

hello i have a 2002 400ex that i have changed the valve seals which was just starting to burn oil . after changing the seals and putting the motor back to gether the motor runs strong but the motor smokes white smoke realy bad . i changed the carb and did not help . can anyone help thanks Rick
:o

[speedfreek]

Did you check side to side movement in guides? Black smoke is gas, bluish white is oil. How many hrs is on top end? Rings maybe?

Smoking only on startup would be seals. Smoking while riding is rings.