Wondering if someone can please help me out?
I have a 1998 YZ400 that was working perfectly just a couple of weeks ago. I rode it a couple of days ago and noticed that it is cutting out in the upper parts of the gears before I should be hitting the rev limiter. I can't even go very fast on the road because it is cutting out so badly when I'm trying to hit top speeds. I thought that maybe I was getting a bad spark so I changed the plug and that seemed to make it better but it is still happening. What else could it be? What should I do?