I'll look for the dot tomorrow. The video I watched showed a single cylinder, like mine, except it has an oil pump and filter. The video shows the small gear going on the crank first, then the cam is installed. When I put my old crank in engine to see how to put it back together, I had to install the cam first, then gear was flipped around so the smooth side was facing out, other wise I couldn't get the sump cover on all the way.
Hope the guy I'm doing this for free appriciates the work I'm doing.