Honda GOLDWING GL1800/A 2015 Owner's Manual page 257

Specifications
Engine Specifications
displacement
bore & stroke
compression ratio
spark plug
(standard)
spark plug (cold
climate)
spark plug (high
speed riding)
valve clearance
(cold)
spark plug gap
idle speed
Power Transmission
primary reduction
secondary reduction
final reduction
gear ratio, 1st
2nd
3rd
4th
OD
final drive
256
Technical Information
111.8 cu-in (1,832 cm
2.91 × 2.80 in (74.0 mm × 71.0 mm)
9.8 : 1
BKR6E-11 (NGK) or
K20PR-U11 (DENSO)
BKR5E-11 (NGK) or
K16PR-U11 (DENSO)
BKR7E-11 (NGK) or
K22PR-U11 (DENSO)
intake 0.006 in (0.15 mm)
exhaust 0.009 in (0.22 mm)
0.039 – 0.043 in (1.00 – 1.10 mm)
700 ± 70 rpm (No adjustment)
1.591
1.028
2.750
2.375
1.454
1.068
0.843
0.685
shaft
3
)