Owner`s manual

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113 Cubic Inch Engine Specifications
ENGINE IGNITION SYSTEM
Number of Cylinders ............................................... 2 Timing ........................ 28° to 32° bTDC Full Advance
Type ................................................... 4-Cycle, 45° V ................................................................................
Compression Ratio ............. Normal Altitude: 9.0 to 1
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Spark Plug Type .......... Champion RN12YC or Equiv.
Dry Weight..................................... ~ 165 lbs. (75 kg) Size .............................................. 14 mm, w/Washer
Bore ............................................. 4 inch (101.6 mm) Gap ..................... 0.040 to 0.045 inch (1 to 1.1 mm)
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Stroke..................................... 4-1/2 inch (114.3 mm) VALVE TRAIN
Displacement (cubic inch) ............................. 113.1 ci Rocker-Arm Ratio ...................................... 1.625 to 1
Displacement (cubic centimeters).............. 1,853.3 cc Intake Valve Diameter........... 2.000 inches (50.8 mm)
................................................................................. Exhaust Valve Diameter ....... 1.605 inches (40.8 mm)
................................................................................. Peak Valve Lift..................... 0.520 inches (13.2 mm)
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FUEL SYSTEM ........................................................ Intake ............................................. Open - 0° bTDC
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Carburetor .. Super G (Butterfly, 2-1/16" (52.3 mm) Bore) .................................................... Close - 40° aBDC
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Fuel .........Unleaded Gasoline: 91 Octane Minimum Exhaust ........................................ Open - 50° bBDC
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Warm Idle Speed ......................... 900 +/- 100 RPM ...................................................... Cloce - 2° aTDC
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................................................................................. (Open/Close Timings @ 0.053 inch (1.346mm) Follower Lift)
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These specifications may change to optimize engine performance and maintain low emissions.