My carb in my 400 ex is getting moisture where the piston goes up and down causing the throttle to stick. I am debating on replacing it with a new carb but wanted to see if anyone has had this problem before and how they corrected it. My freind also has an 02 400ex that is doing the same thing. Thanks in advance for any help.

 

Check the o=ring on the top and make sure that it is installed correctly. Is the bolt tight around the cable going into the plate? How much water are you riding in or thought?