Honda CBR150R Manual page 265

IGNITION SYSTEM
The ignition timing is correct if the "F" mark aligns with
the index notch on the left crankcase cover.
Apply oil to the O-ring and install and tighten the timing
hole cap to the specified torque.
TORQUE 6 N.m (0.6 kgfm. 4.3 Ibf4t)
18-7