Honda 1981 GL1100 interstate Owner's Manual page 20

SERIAL NUMBERS
The frame and engine serial numbcrs are
required_ when registerjng your
motor_
cycle. I hey may also be required by your
deater when ordering replacement parts.
Recold the numbers here for your refer,
ence.
The VIN, Vehicle Identification N
(l),
is on the Safety Certification
FRAME NO.
ENGINE NO.
affixed
to the left side of the
head. This number
is the same a.s
fra me number t2) stamped on the
side of the steering head.
(l)
VIN number
14
(2) Frarne number