I set the max speed at 160kph, but the way the code works, a human rider can exceed the max set. The AI will stick to the max though.
AI handling was one thing I worked alot on, nothing worse and more frustrating than seeing AI riders run into walls or signposts as they try to take a corner. They will still come off in some places, but there wasn't much I could do about it.
If you find the AI consistently crashing in a spot, then put a waypoint at the trouble spot, as this will make them slow down at that point.
SelectThis