[Code of Federal Regulations]

[Title 40, Volume 24]

[Revised as of July 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 40CFR205.153]



[Page 132]

 

                   TITLE 40--PROTECTION OF ENVIRONMENT

 

         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)

 

PART 205_TRANSPORTATION EQUIP MENT NOISE EMISSION CONTROLS--Table of 

Contents

 

                          Subpart D_Motorcycles

 

Sec.  205.153  Engine displacement.



    (a) Engine displacement must be calculated using nominal engine 

values and rounded to the nearest whole cubic centimeter, in accordance 

with American Society for Testing Materials (ASTM) E 29-67.

    (b) For rotary engines, displacement means the maximum volume of a 

combustion chamber between two rotor tip seals minus the minimum volume 

of that combustion chamber between those two rotor seals times three 

times the number of rotors.



cc=(Maximum chamber volume-minimum chamber volume) x 3 x number of 

          rotors.