LOW COMPRESSION PRESSURE IN CYLINDER
a) IMPROPER EXHAUST VALVE TIMING ADJUSTMENT.
b) IMPROPER SEATING OF EXHAUST VALVE.
c) CRACK OR BROKER EXHAUST VALVE.
d) WORN OUT PISTON RING.
e) EXHAUST VALVE BENT, DEFECTIVE CYLINDER HEAD.
f) IMPROPER SEATING OF VALVE GUIDE.
g) CRACKED PISTON.
