2007 Buell Lightning: 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.
Table 3-1. General Information
Type 2 cylinder, air cooled, four-stroke 45 Degree V-twin
Compression ratio 10:1
Bore (all models) 3.50 in. 88.9 mm
Stroke (XB9SX) 3.125 in. 79.38 mm
Stroke (XB12S) 3.812 in. 96.82 mm
Engine displacement (XB9SX) 60.05 cu. in. 984 cc
Engine displacement (XB12S) 73.4 cu. in. 1203cc
Oil capacity (with filter change) 2.5 quarts 2.37 liters
Table 3-2. Engine Ignition Specifications
Type Sequential, non waste spark
Regular idle 1050-1150 RPM
Spark plug size 12 mm
Spark plug type Harley-Davidson No. 10R12A
Spark plug gap 0.035 in. 0.8890 mm
Spark plug torque 12-18 ft-lbs 16-24 Nm
Table 3-3. Valve and Valve Seat Specifications
VALVE NEW COMPONENTS SERVICE WEAR LIMITS
Fit in
guide
Exhaust 0.001-0.003 in. 0.0254-0.0762 mm 0.0038 in. 0.1016 mm
Intake 0.001-0.003 in. 0.0254-0.0762 mm 0.0038 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
2.028-2.064 in. 51.511-52.426 mm 2.082 in. 52.8828 mm
Table 3-4. Valve Spring Specifications
VALVE SPRING NEW COMPONENTS SERVICE WEAR LIMITS
Free length 2.325 in. 59.1 mm 2.325. (min) 59.1 mm (min)
Intake 1.850 in. (closed)
135 lbs 61.2 kg
1.300 in. (open)
312 lbs 141.5 kg
Exhaust 1.850 in. (closed)
135 lbs 61.2 kg
1.300 in. (open)
312 lbs 141.5 kg
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