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2-18 Cylinder Head Volume Specifications NOTE: For cylinder head volume tests, see appropriate Measuring Critical Components sub-section. Engine Piston Travel Versus Crank Angle Chart NOTE: When using any of the charts blow, first know the engine stroke and timing in degrees; then select ENGINE TYPE SQUISH - GAP 370 cc mm 2.27-2.95 in. .089-.116 500 cc mm 1.5 in. .059 570 cc mm 1.69 in. .066 600 cc mm 1.5 in. .059 800 cc mm 1.5 in. .059 1000 cc mm 1.49 in. .058 ! CAUTION These specifications are not intended to be used for 500 cc 600/800 cc 370 cc 570 cc 1000 cc 63 mm stroke 70 mm stroke 65 mm stroke 66 mm stroke 78 mm stroke Degree BTDC mm BTDC in. BTDC mm BTDC in. BTDC mm BTDC in. BTDC mm BTDC in. BTDC mm BTDC in. BTDC 12 0.867 0.034 0.969 0.038 0.901 0.035 0.917 0.036 1.062 0.042 15 1.351 0.053 1.509 0.059 1.403 0.055 1.429 0.056 1.655 0.065 18 1.937 0.076 2.164 0.085 2.012 0.079 2.049 0.081 2.374 0.093 20 2.384 0.094 2.663 0.105 2.476 0.097 2.522 0.099 2.869 0.113 |