Had my engine for machine work at Rimco,
and after they forget to send parts back I know finally after ... I have my dowel pins from the flywheel back I send in case they needed them for the balancing.

I am not sure if they send me the right pins back so here are the pics with measurements...

Click to view attachment
Click to view attachment
Click to view attachment

Does somebody have a set laying arround he or she can compare the size?
20 mm x 6 mm

Yeah, I have three out, waiting to go back in. I will try to remember tonight. Right off the bat though, the ones you have look spot on.

They are 6 mm O.D.

They stick out of the flywheel approximately 11 mm on the one I measured. Sorry, not pulling them out to get an overall length.

Just saw this.....Looks like they sent you the correct ones..........Jerry