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How to Fit a Moped Boost Bottle

Mopeds are defined as motorized bikes that have pedals. To be considered a moped, the engine has to be under 50cc, Moped lovers experiment with many different modifications to increase the power of their small engines while maintaining its moped purity. A boost bottle is one modification that maximizes a moped's power and efficiency. However, to actually work, they must fit your engine properly.

Things You'll Need

Engine cylinder specifics

Instructions

- 1
  Find your engine's cylinder size. Divide your engine size (i.e. 25cc, 49cc) by 16.3871. The result of this equation is your cylinder size in cubic inches (i.e. 2.99 cubic inches for a 49cc moped engine).
- 2
  Find the height of your cylinder. Divide your cylinder's cubic inch measurement by .785., which is the result of multiplying 3.14 (pi) by the radius squared of your cylinder. Most cylinders have a 1-inch diameter, giving us a radius of .50-inch (.50 squared is .25)
- 3
  Find the volume of the boost bottle that will fit your particular engine. A boost bottle should either be the same size as your cylinder or slightly smaller, but not larger. Use the equation V=3.14(.25)(height) to determine the appropriate boost bottle volume size that will fit perfectly to your moped's engine.

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