They use about 1/2 qt week. My dealer broke down the one with 400 hrs. Dirt has gotten in around the intake on the head and there are no signs of dirt from the air filter to the intake. KAW told them dirt can only come in from air filter but there are no signs of a dirt trail. KAW said not there problem but it is still in warranty.
Sounds to me like you have a air leak between the filter housing and the engine.