Thanks for the replies. I will be tearing down the xl this weekend, fingers crossed that the head is in better shape. If memory serves, that engine jumped time so likely bent valve but hopefully no scoring.
Question on the 100 cam - will a stock cam from a 2004 crf100 fit? I upgraded my 100's for at-home flattracking and have two stock cams sitting around.
The xr75 will be a rider, want it nice but not restoration-quality. I'm also working on a 1975 xr resto project but not finding the parts I need at a reasonable price so it sits... So many projects and so little time.
Terry, I'm the guy who traded you the xr100 engine for the Pitster parts last year - man, that bike is fun!