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1975-77 GOLD WINGS

Gold Wing GL1000

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1975-77 SPECIFICATIONS
Dimensions
Overall length2305-2340 mm
Overall width875 mm
Overall height1225 mm
Wheelbase1545 mm
Seat height810 mm
Foot peg height305 mm
Ground clearance150 mm
Dry weight265 kg
Frame
TypeDouble cradle
Front suspension and travelTelescopic fork, 143 mm
Rear suspension and travelSwing arm, 86.3 mm
Front tire size and air pressure3.50 H 19 (4PR) 2 kg/sq. cm (28 psi)
Rear tire size and air pressure4.50 H 17A (4PR) 2.8 kg/sq. cm (40 psi)
Front brakeDouble disc brake
Rear brakeDisc brake
Fuel capacity19 liters (5.0 US gal; 4.2 Imp gal)
Fuel reserve capacity3 liters (0.8 US gal; 0.7 Imp gal)
Caster angle62 degrees
Trail length120 mm
Front fork oil capacity195-205 cc (to fill if dry) 170-180 cc (refill after draining)
Engine
TypeWater cooled, 4-stroke O.H.C. engine
Cylinder arrangementFlat, Four
Bore & stroke72 x 61.4 mm
Displacement999 cc
Compression ratio9.2:1
Valve trainBelt driven over head camshaft
Oil capacity3.5 lit. (3.7 US qt; 3.1 Imp. qt)
Lubrication systemForced and wet sump
Cylinder head compression pressure12 kg/cm² (171 psi)
Intake valve opensat 5° (before top dead center)
Intake valve closesat 50° (after bottom dead center)
Exhaust valve opensat 50° (before bottom dead center)
Exhaust valve opensat 5° (after top dead center)
Valve tappet clearanceIN - EX 0.1 mm (0.004 in)
Idle speed900 rpm
Carburetion
Carburetor typeCV type, 32 mm venturi bore
Setting number755A
Standard main jet (primary)No. 65
Standard main jet (secondary)No. 125
Standard slow jetNo. 35
Air jet (primary)No. 120
Air jet (secondary)No. 60
Slow air jetNo. 125
Idle mixture screw initial setting1 3/8
Float level21 mm
Drive train
ClutchWet, multi-plate type
Transmission5-speed, constant mesh
Primary reduction ratio1.708
Secondary reduction ratio0.825
First gear ratio2.500
Second gear ratio1.708
Third gear ratio1.333
Fourth gear ratio1.097
Fifth gear ratio0.939
Final reduction ratio3.400
Gear shift patternLeft foot operated return system
Final gear oil capacity200-220 cc
Electrical
IgnitionBattery and ignition coil
Ignition point gap0.3 - 0.4 mm (0.012 - 0.016 in.)
Ignition advance "F" mark5° (BTDC)
Ignition advance maximum advance5° - 32°
Ignition advance rpm from "F" to max. advance1450-2450 rpm
Starting systemStarting motor and kick starter
AlternatorAC generator, 12 volt, 0.3 KW/5000 rpm
Battery capacity12 V - 20 AH
Spark plugNGK D8ES-L
Spark plug gap0.6-0.7 mm (0.024-0.028 in)
Dwell angle90° ± 2.5°
Condenser capacity1.4µF
Lights
Headlight (low/high beam)12V - 40/50W
Tail/stop light12V - 3/32 cp (No. 1157)
Front turn signal light12V - 32 cp (No. 1034)
Rear turn signal light12V - 32 cp (No. 1073)
Meter light12V - 2 cp (No. 57)
Neutral indicator light12V - 2 cp (No. 57)
Turn signal indicator light12V - 3.4W
High beam indicator light12V - 3.4W
Oil pressure warning light12V - 3.4W
Headlight warning light12V - 3.4W
Tail/stop light warning light12V - 3.4W
Position light12V - 3 cp


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1975-77 MAINTENANCE STANDARD
Engine
ItemAssembly standardService limit
Cylinder head gasketed surface warpage0.8 (0.0032)0.1 (0.0039)
Valve to guide clearance IN0.01-0.04 (0.0004-0.0016)0.08 (0.0032)
Valve to guide clearance EX0.05-0.07 (0.0020-0.0028)0.1 (0.0039)
Valve guide I.D. IN,EX6.60-6.62 (0.3598-0.2606)6.64 (0.2614)
Valve seat width1.4 (0.0551)---
Rocker arm I.D.14.00-14.018 (0.5512-0.5519)14.05 (0.5532)
Rocker arm shaft O.D.13.966-13.984 (0.5498-0.5505)13.94 (0.5488)
I.D. of camshaft journal of cylinder head (Right & left)27.000-27.021 (1.0630- 1.0638)26.98 (1.0623)
I.D. of camshaft journal of cylinder head (Center)25.000-25.021 (0.9843- 0.9851)24.98 (0.9835)
Camshaft O.D. (Right & left)26.954-26.970 (1.0612-1.0619)26.91 (1.0595)
Camshaft O.D. (Center)24.954-24.970 (0.9824-0.9831)24.91 (0.9807)
Camshaft Base dia.29.98-30.02 (1.1804-1.1819)29.93 (1.1784)
Cam lift IN8.42-8.58 (0.3315-0.3378)8.37 (0.3295)
Cam lift EX8.42-8.58 (0.3315-0.3378)8.37 (0.3295)
Valve spring free length (Inner)40.2 (1.5827)39 (1.5354)
Valve spring free length (Outer)43.75 (1.5827)39 (1.5354)
Cylinder block gasketed surface warpage0.08 (0.0032)0.1 (0.0039)
Cylinder I.D.72.000-72.015 (2.8346-2.8352)72.1 (2.8386)
Cylinder Out of round at bore0.1 (0.0039)0.15 (0.0059)
Cylinder Difference in I.D.s between top and bottom0.007-0.012 (0.0003-0.0040)0.05 (0.0020)
Cylinder Difference in I.D.s between cylinders0.02 (0.0008)0.1 (0.0039)
Piston O.D. at skirt71.945-71.97 (2.8325-2.8335)71.85 (2.8288)
Cylinder to piston clearance0.03-0.07 (0.0012-0.0028)0.15 (0.0059)
Piston ring groove width (top & second)1.5-1.52 (0.0591-0.0599)1.6 (0.0630)
Piston ring groove width (oil)2.805-2.82 (0.1104-0.1110)2.9 (0.1142)
Piston ring side clearance (top & second)0.02-0.045 (0.0008-0.0018)0.15 (0.0059)
Piston ring gap (top & second)0.25-0.40 (0.0098-0.0158)0.7 (0.0276)
Piston ring gap (oil)0.2-0.9 (0.0079-0.0354)1.1 (0.0433)
Connecting rod axial play0.15-0.30 (0.0059-0.0118)0.4 (0.0158)
Crankshaft bend0.03 (0.0012)0.05 (0.0019)
Crankshaft out of round (journal)0.005 (0.0002)0.008 (0.0003)
Crankshaft taper (journal)0.002 (0.00008)0.004 (0.0002)
Crankshaft oil clearance (journal)0.02-0.044 (0.0008-0.0017)0.08 (0.0032)
Oil pump inner to outer rotor radial clearance (main, clutch)0.15 (0.0059)0.35 (0.0138)
Oil pump rotor to body side clearance (main)0.02-0.07 (0.0008-0.0028)0.12 (0.0047)
Oil pump rotor to body side clearance (clutch)0.02-0.1 (0.0008-0.0039)0.12 (0.0047)
Oil pump outer rotor to body radial clearance0.15-0.21 (0.0059-0.0083)0.41 (0.0161)
Clutch friction disc thickness3.42-3.58 (0.1347-0.1410)3.2 (0.1260)
Clutch plate warpage---0.3 (0.0118)
Clutch spring free length35.5 (1.3976)34.2 (1.3386)
Clutch spring load (in six springs)142.8 kg/23 mm (314.8 lb/0.9055 in.)130.8 kg/23 mm (288 lb/0.9055 in.)
Transmission gear backlash (Low)0.044-0.121 (0.0017-0.0048)0.2 (0.0079)
Transmission gear backlash (Second)0.044-0.088 (0.0017-0.0035)0.17 (0.0067)
Transmission gear backlash (Third, fourth, top)0.046-0.094 (0.0018-0.0037)0.17 (0.0067)
Transmission shaft to M4/C2/C3 gears clearance0.040-0.082 (0.0016-0.0032)0.182 (0.0072)
C1/M4 gears to thrust bushings clearance0.040-0.082 (0.0016-0.0032)0.182 (0.0072)
Gearshift fork I.D.13.000-13.018 (0.5118-0.5125)13.04 (0.5134)
Shift fork shaft O.D.12.966-12.984 (0.5105-0.5112)12090 (0.5079)
Gearshift drum O.D. (Inside)11.966-11.984 (0.4711-0.4718)11.95 (0.4705)
Gearshift drum O.D. (Outside)35.959-35.980 (1.4157-1.4166)35.92 (1.4142)
Gearshift drum Groove width13.000-13.018 (0.5118-0.5125)13.04 (0.5134)
Final gear shaft damper spring free length110.9 (4.3661)100.0 (3.9370)
Starter carbon brush length12-13 (0.4724-0.5118)5.5 (0.2165)
Starter carbon brush spring tension560-680 gr. (19.75-23.99 oz.)400 gr. (14.11 oz)


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1975-77 MAINTENANCE STANDARD
Frame
ItemAssembly standardService limit
Front shock absorber free length525 (20.67)500 (19.69)
Front shock absorber tension47-53 kg/458.3 mm (103.6-116.9 lb/18.04 in)32.8 kg/457.3 (72.3 lb/18.0 in)
Front fork pipe O.D.36.925-36.950 (1.4538-1.4548)36.90 (1.4528)
Front fork bottom case I.D.37.065-37.104 (1.4593-1.4608)37.250 (1.4666)
Front and rear axles bend0.005 (0.0002)0.2 (0.0079)
Front wheel bearing play (axial)0.07 (0.0028)0.1 (0.0039)
Front wheel bearing play (radial)0.003 (0.0001)0.05 (0.0020)
Wheel rim runout0-0.5 (0-0.020)2.0 (0.0787)
Wheel disc runout0.5 (0.020)0.3 (0.0118)
Front wheel disc thickness4.8-5.2 (0.19-0.20)4.0 (0.16)
Front brake master cylinder I.D.17.460-17.503 (0.5874-0.6891)17.515 (0.6896)
Front brake master cylinder piston O.D.17.417-17.444 (0.6857-0.6868)17.400 (0.6850)
Caliper I.D. (at piston)38.18-38.23 (1.5032-1.5051)38.245 (1.5057)
Caliper piston O.D.38.115-38.148 (1.5006-1.5019)38.105 (1.5002)
Final drive gear backlash0.08-0.15 (0.0032-0.0020)0.25 (0.0098)
Rear shock absorber spring free length246.7 (9.71 in)242.5 (9.547)
Rear shock absorber spring tension39.1 kg/225.6 mm (86.2 lb/8.87 in)39.1 kg/221.4 mm (86.2 lb/8.72 in)
Rear wheel ball bearings (6204 and 6304) play (axial)0.07 (0.0028)0.1 (0.0039)
Rear wheel ball bearings (6204 and 6304) play (radial)0.005 (0.002)0.06 (0.0024)
Rear wheel disc thickness6.9-7.1 (0.2717-0.2795)6.0 (0.2362)
Rear brake master cylinder I.D.14.000-14.043 (0.5512-0.5529)14.055 (0.5533)
Rear brake master cylinder Piston O.D.13.957-13.984 (0.5495-0.5505)13.940 (0.5488)
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