WR on right
Notice larger fins &
wider gasket area

WR on left
Notice larger fins &
huge intake port (Pan size!)

WR on left
Notice much larger fins &
oil passage in sleeve

WR on right
Notice much thicker exhaust
port for better cooling

WR gasket area
Notice how valves are
very close to bore

WL cylinder
valve stem is parralelle
to bore

WR cylinder
valve stem is tilted
towards bore