Ya, that sounds about right. And you're actually not even going seventy. Ohh, to have an accurate speedometer and a sixth gear.
There are two ten millimeter nuts on the shift rod. Loosen them and make a minor adjustment to the rod. Other wise remove the ten millimeter pinch bolt from the rod itself to move more.
When you're turning the rod for adjustment make sure you leave a few threads in on each end so the rod won't come loose.