HERCULES J X SERIES VALVE TIMING IN DEGREES.
( J X A, J X B, J X C , J X D , J X E – 3 , J X L D ).
INTAKE PERIOD = 240 DEGREES.
INTAKE OPENS 5 DEGREES BEFORE T.D.C.
INTAKE CLOSES 55 DEGREES AFTER B.D.C.
EXHAUST PERIOD = 240 DEGREES.
EXHAUST OPENS 45 DEGREES BEFORE B.D.C.
EXHAUST CLOSES 15 DEGREES AFTER T.D.C.
INFORMATION from Diamond T Factory bulletin S M 1Z – 4.