TABLE 1
GOLD WING ENGINE SPECIFICATIONS (4-cyl.)
GL1000
1975-77GL1000
1978-79GL1100Std
1980-81GL1100I
1982-83GL1200AH
1987 (Swiss)GL1200AH
1987 (other)Bore (B mm / in)
72.0 / 2.835
72.0 / 2.835
75.0 / 2.953
75.0 / 2.953
75.5 / 2.972
75.5 / 2.972
Stroke (S mm / in)
61.4 / 2.417
61.4 / 2.417
61.4 / 2417
61.4 / 2.217
66.0 / 2.598
66.0 / 2.598
Cubic capacity (CC cc / in3)
999 / 60.96
999 / 60.96
1085 / 66.21
1085 / 66.21
1181 / 72.07
1181 / 72.07
Compression ratio (CR)
9.2
9.2
9.2
9.2
9.0
9.0
Compression pressure (CP kg.cm-2 / psi)
12.03 / 171
12.03 / 171
12.03 / 171
12.03 / 171
13.01 / 185
13.01 / 185
Combustion Space (CV cc / in3)
30.49 / 1.860
30.49 / 1.860
33.08 / 2.019
33.08 / 2.019
36.94 / 2.254
36.94 / 2.254
Cam lobe base circle (CBC mm / in)
30.00 / 1.181
?
?
?
?
?
Cam lobe height intake (ICH mm / in)
37.14 / 1.462
36.80 / 1.449
37.00 / 1.457
37.00 / 1.457
35.80 / 1.409
35.57 / 1.400
exhaust (ECH mm / in)
36.80 / 1.449
36.80 / 1.449
36.80 / 1.449
36.80 / 1.449
35.80 / 1.400
35.571.400
Rocker arm ratio (RAR)
?
?
?
?
?
/
Valve lift intake (IVL mm / in)
8 50 / 0.335
8.50 / 0.335
8.80 / 0.346
8.80 / 0.346
9.00 / 0.354
9.00 / 0.354
exhaust (EVL mm / in)
8.50 / 0.335
8.50 / 0.335
8.50 / 0.335
8.50 / 0.335
9.00 / 0.354
9.00 / 0.354
Valve diameter intake (IVD mm / in)
38.0 / 1.496
38.0 / 1.496
38.0 / 1.496
38.0 / 1.496
36.0 / 1.417
36.0 / 1.417
exhaust (EVD mm / in)
32.0 / 1.260
32.0 / 1.260
32.0 / 1.260
32.0 / 1.260
32.0 / 1.260
32.0 / 1.260
Valve timing @ 1 mm / 0.04 in lift
Intake open (IVO ° BTDC)
5
5
5
5
10
5
close (IVC ° ABDC)
50
35
43
43
40
40
Exhaust open (EVO ° BBDC)
50
40
43
43
40
40
close (EVC ° ATDC)
5
5
5
5
10
5
Intake duration angle (IDA °)
235
220
228
228
230
225
cam angle (ICA °)
112.5
105
109
109
105
107.5
Exhaust duration angle (EDA °)
235
225
228
228
230
225
cam angle (ECA °)
112.5
107.5
109
109
105
107.5
Intake / Exhaust overlap (IEO °)
10
10
10
10
20
10
Carburetor venturi (CVD mm / in)
32 / 1.26
31 / 1.22
30 / 1.18
30 / 1.18
30 / 1.18
30 / 1.18
type
755A
771A
VB48A
VB48C
VD63H
VD63F
Dry Wt. (add ca. 23kg / 50lbs wet) (kg / lbs)
265 / 584
274 / 604
267 / 589
308 / 679
337 / 743
337 / 743
Published performance PS / HP
81 / 80 @ 7500
79 / 78 @ 7000
84 / 83 @ 7500
84 / 83 @ 7500
?
95 / 94 @ 7000
Torque(Nm / ftlbs)
80 / 59 @ 6500
83 / 61 @ 5500
91 / 67 @ 5500
91 / 67 @ 5500
?
105 / 77 @ 5000
Published Weight / Power Ratio (kg.PS-1 / lbs.HP-1)
3.27 / 7.30
3.47 / 7.74
3.26 / 7.18
3.76 / 8.28
?
3.55 / 7.90
TABLE 2
| OTHER SPECIFICATIONS | 1973 BMW R90/S |
1969 Honda CB 750 |
1967 Norton 750 Commando |
| Bore (B mm / in) | 90.0 / 3.54 | 61.0 / 2.40 | 73.0 /2.87 |
| Stroke (S mm / in) | 70.6 / 2.78 | 63.0 / 2.48 | 89.0 / 3.50 |
| Cubic capacity (CC cc / in3) | 898 /54.80 | 736/44.93 | 745 / 45.5 |
| Compression ratio (CR) | 9.5 | 9.0 | 8.9 |
| Valve diameter intake (IVD mm / in) | 42.0 / 1.65 | ? | 38.0 / 1.50 |
| exhaust (EVD mm / in) | 40.0 / 1.57 | ? | 33.0 / 1.30 |
| Valve timing @ 1 mm / 0.04 in lift | |||
| Intake open (IVO ° BTDC) | 10 | 5 | 50 |
| close (IVC ° ABDC) | 50 | 30 | 74 |
| Exhaust open (EVO ° BBDC) | 50 | 35 | 82 |
| close (EVC ° ATDC) | 10 | 5 | 42 |
| Intake duration angle (IDA °) | 240 | 215 | 304 |
| cam angle (ICA °) | 110 | 102.5 | 102 |
| Exhaust duration angle (EDA °) | 240 | 220 | 304 |
| cam angle (ECA °) | 110 | 105 | 110 |
| Intake / Exhaust overlap (IEO °) | 20 | 10 | 92 |
| Carburetor venturi (CVD mm / in) | 38 / 1.50 | 28 / 1.10 | 30 / 1.18 |
| type | Dell’Orto | Keihin | Amal 930 |
| Dry Wt. (add ca. 23kg / 50lbs wet) (kg / lbs) | 205 / 452 | 218 / 481 | 180 / 398 |
| Published Performance PS / HP | 68/67 @ 7000 | 68/67 @ 8000 | 57/56 @ 6500 |
| Torque (N.m / ft.lbs) | ? | 60/44 @ 7000 | ? |
| Published Weight / Power Ratio (kg.PS-1 / lbs.HP-1) | 3.01 / 6.75 | 3.21 / 7.18 | 3.16 / 7.11 |