Thanks to Knukkel
I was able to borrow a knucklehead engine for a while!
I will take it apart, measure and model all the parts in CAD,
and then put it back together again...
week I modeled the lower tins that cover the rockers. The intake
and exhaust covers are not the same, not only are the intake
covers morrored and shorter, a lot of dimensions are slightly
different too. Each cover has about 65 features, I modeled 2
of 'em and mirrored the others. I also modeled rockershafts
and valveguides. Time spent this week 14 hours.