i have an 02 400ex. i was riding it the other day and all the sudden it bogged way down. It ran perfectly before this. Now it just cuts in and out. It starts fine and idles fine but when i hold the throttle down its like it has no power and cuts in and out. I have a friend that told me it was the stator but I wanted to make sure thats what it was before I bought a replacement. If anyone has any ideas I would appreciate it.