
If your Honda 400ex engine is ticking you should either take it in to a dealership for a Honda 400ex valve job.
When was the last time you changed the oil in your 400ex? It is possible that an oil change will fix this problem. If this doesn\t fix the problem you will need to check your 400ex valve clearance.
If you do not feel comfortable checking your valve clearance find a Honda atv dealer near you.