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Vehicle body frame of motorcycles

  • US 20050263334A1
  • Filed: 08/01/2003
  • Published: 12/01/2005
  • Est. Priority Date: 08/30/2002
  • Status: Active Grant
First Claim
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1. A vehicle frame structure for a motorcycle, which comprises a head block including a head tube, a main frame forked leftwards and rightwards from the head block to form a pair of left and right main frame half portions extending rearwardly thereof, and swing arm brackets extending downwardly from rear ends of the main frame half portions;

  • wherein an inner frame portion of the main frame positioned inside the vehicle frame structure and the swing arm brackets in their entirety or respective inner portions of the swing arm brackets are integrally formed by an inner member prepared from a metal casting, and wherein at least an outer frame portion of the main frame is formed by an outer member prepared from a sheet metal;

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