Got in about 20 minutes at Roebling then heard serious knocking from the engine...limped into paddock & shut it down. Towed it home (950 miles round trip for 20 minutes on track ) and dopped the engine. Couldn't turn the crank by hand on the fan. So, split the cases. Here's what greeted me as I opened it up--one ear of the windage tray had failed and slid over and was caught under the cam. Check the pics--you can see where the cam was striking the sheet metal piece....nice and shiny there.
It's a "CB" bus case.....anyone seen this before? Anyone with a replacement tray??
Now the plot thickens...see the pics of the crank....think it'll buff out?
No wonder it lost power....