Annoying noises while riding

What to do about the groaning noise from the wooden top of the halfbike while riding? Does someone have an idea?

Hi Stephan, You can follow our lubrication manual here halfbikes.com/lubrication Let me know how it goes.

How about a slight grinding, creaking noise coming from the crank area on the last quarter of the left downstroke? Doesn't seem to be any external way to lubricate?

Can you take a video of the noise, so we have a better idea? You can send it over to hello@halfbikes.com