Dad started tearing into the engine and he figured out what the ticking
in the top end was. Look closely at the contact pad on the exhaust
valve rocker arm. It has worn through the hard surfacing. Looks like
we'll need new rocker arms and a cam. These engines had a known problem
of oil starvation to the exhaust rocker pad. While Dad had the bike he
moved the oil line to the exhaust side to try and help avoid these
issues. Maybe it was starved for oil at some point.
