Classic Cycles Technical Resources
83
EXAMPLES OF CONVERSIONS
1. To convert 250 cubic centimeters to cubic inches, multiply 250 cubic centimeters by 0.061:
250 × 0.061 = 15.25 cubic inches
2. To convert 0.65 inch to millimeters, multiply 0.65 inch by 25.4:
0.65 × 25.4 = 16.51 millimeters
3, To convert 76 kilograms to pounds, multiply 76 kilograms by 2.205:
76 × 2.205 = 167.58 pounds
4. To convert 41 miles per gallon to kilometers per liter, multiply 41 miles per gallon by 0.4252:
41 × 0.4252 = 17.43 kilometers per liter
5. To convert 50 miles per hour to feet per second, multiply 50 miles per hour by 1.467:
50 × 1.467 = 73.35 feet per second
TEMPERATURE
It is sometimes specified in a service manual to perform a repair operation at a certain temperature, such
as heating crankcase halves to 150 degrees C before installing bearings. There are two basic formulas for
converting degrees F to degrees C and vice versa:
C= 5/9 (F ! 32)
F = 9/5C + 32
Example 1
Measurement temperature for the electrolyte in a battery is specified as 68 degrees F. What is that
temperature in degrees C?
C = 5/9 (F !32)
C = 5/9 (68 ! 32)
C = 5/9 × 36
C = 180 / 9
C = 20 degrees C
Example 2
A motorcycle service manual specifies that main bearings be heated to 200 degrees C before installing them
onto the crankshaft. What is that temperature in degrees F?
F = 9/5C + 32
F = (9/5 × 200) + 32
F = 360 + 32
F = 392 degrees F
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