Yes, counter clockwise to advance and clockwise to retard. Your flywheel will have a tiny, embossed arrow pointing in the direction of operation. Batavus has a "tool" for setting point gap and timing. I can't find it ANYWHERE!!! Basically, it is a duplicate of the cam on the flywheel without having a flywheel attached to it. So you can actually see what you're doing when setting all of this. I've thought about finding a spare, identical flywheel and cutting the cam off of it to make my own timing tool.
I've had a huge set back with my Bat. May have soft seized her. My son was taking her for her first voyage with the new carb and he explained the sound as something of a pterodactyl. So, I'll be tearing into her again. I'm pretty damn angry about it as she was FINALLY running beautifully.