3-1
SPECIFICATIONS
GENERAL
Number of cylinders 2
Type 4-cycle, 45
°
V Twin
Horsepower 91 @ 5800 RPM
Torque (foot-pounds) 87 @ 5200 RPM
Compression ratio 10.0 to 1
Bore 3.500 in. 88.9 mm
Stroke 3.812 in. 96.82 mm
Piston displacement
73.4 in.
3
1203 cc
Oil tank capacity with filter 2.1 quarts 1.90 liters
ENGINE IGNITION SPECIFICATIONS
Timing during engine
cranking
5
°
BTDC
Timing with engine at
RPM listed below and
V.O.E.S. connected
20
°
BTDC
Regular idle 950-1050
RPM
(49 State)
1150-1250
RPM
(Calif.)
Fast idle (all models) 2000 RPM
Spark plug gap 0.038-0.045 in. 0.96-1.14 mm
NOTE
Service wear limits are given as a guideline for measuring components that are not new. For measurements not given under
SERVICE WEAR LIMITS, see NEW COMPONENTS.
ITEM NEW COMPONENTS SERVICE WEAR LIMITS
VALVE
Fit in
guide
Exhaust 0.0015-0.0033 in. 0.038-0.084 mm 0.0040 in. 0.102 mm
Intake 0.008-0.0026 in. 0.020-0.066 mm 0.0035 in. 0.089 mm
Seat width 0.040-0.062 in. 1.02-1.57 mm 0.090 in. 2.29 mm
Stem protrusion from
cylinder valve pocket
1.975-2.011 in. 50.17-51.08 mm 2.031 in. 51.59 mm
OUTER VALVE SPRING
Free length 2.105-2.177 in. 53.47-55.30 mm 2.105 in. (min) 53.47 mm (min)
Intake 1.751-1.848 in.
(closed)
72-92 lbs 32.6-41.7 kg
1.286-1.383 in.
(open)
183-207 lbs 82.9-93.8 kg
Exhaust 1.751-1.848 in.
(closed)
72-92 lbs 32.6-41.7 kg
1.332-1.429 in.
(open)
171-195 lbs 77.5-88.3 kg
INNER VALVE SPRING
Free length 1.926-1.996 in. 48.92-50.70 mm 1.926 in. (min) 48.92 mm (min)
Intake 1.577-1.683 in.
(closed)
38-49 lbs 17.2-22.2 kg
1.112-1.218 in.
(open)
98-112 lbs 44.4-50.7 kg
Exhaust 1.577-1.683 in.
(closed)
38-49 lbs 17.2-22.2 kg
1.158-1.264 in.
(open)
91-106 lbs 41.2-48.0 kg
3
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