2002 Buell S3T: Engine 3-1
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SPECIFICATIONS 3.1
NOTE
Service wear limits are given as a guideline for measuring
components that are not
new
. For measurement specifica-
tions not given under SERVICE WEAR LIMITS, see NEW
COMPONENTS.
GENERAL
Number of Cylinders 2
Type Air cooled, four-stroke
45 Degree V-twin
Horsepower 101 @ 6200 RPM
Torque 90 ft-lbs @ 5500 RPM
Compression Ratio 10.0 to 1
Bore 3.498 in. 88.849 mm
Stroke 3.8125 in. 96.838 mm
Engine Displacement 73.4 cu. in. 1203 cc
Oil Tank Capacity (with fil-
ter change)
2.0 quarts 1.89 liters
CAMSHAFT SPECIFICATIONS
Lift @ Valve (TDC)
Intake/Exhaust
0.211 in./0.191 in.
Duration @ 0.053 Lift
Intake/Exhaust
256°/256°
Timing @ 0.053 Lift
Open/Close
Intake: 28° BTDC/48° ABDC
Exhaust: 52° BBDC/24° ATDC
ENGINE IGNITION SPECIFICATIONS
Type Sequential, non waste spark
Regular Idle
850-1050 RPM
Spark Plug Size
12 mm
Spark Plug Type
Harley-Davidson No. 10R12
Spark Plug Gap
0.038-0.043 in. 0.97-1.09 mm
Spark Plug Torque
11-18 ft-lbs 15-24 Nm
ITEM NEW COMPONENTS SERVICE WEAR LIMITS
VALVE
Fit in
guide
Exhaust 0.0015-0.0033 in. 0.0381-0.0838 mm 0.0040 in. 0.1016 mm
Intake 0.0008-0.0026 in. 0.0203-0.0660 mm 0.0035 in. 0.0889 mm
Seat width 0.040-0.062 in. 1.016-1.575 mm 0.090 in. 2.286 mm
Stem protrusion from
cylinder valve pocket
1.975-2.011 in. 50.165-51.079 mm 2.031 in. 51.587 mm
OUTER VALVE SPRING
Free length 2.105-2.177 in. 53.467-55.296 mm 2.105 in. (min) 53.467 mm (min)
Intake 1.751-1.848 in.
(closed)
72-92 lbs 33-42 kg
1.286-1.383 in.
(open)
183-207 lbs 83-94 kg
Exhaust 1.751-1.848 in.
(closed)
72-92 lbs 33-42 kg
1.332-1.429 in.
(open)
171-195 lbs 78-88 kg
3
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