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Frame structure of motorcycle

  • US 6,679,347 B2
  • Filed: 05/10/2002
  • Issued: 01/20/2004
  • Est. Priority Date: 06/12/2001
  • Status: Expired due to Fees
First Claim
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1. In a motorcycle wherein a pair of left and right mainframes extend from a head pipe to a rear portion of a vehicle body, a pivot plate is joined to rear ends of the mainframes, a rear swing arm extends from the pivot plate, an air cleaner is mounted above the rear swing arm, the air cleaner is connected to the carburetor via a connecting tube, and the carburetor is connected to an engine located below the mainframe, a frame structure of a motorcycle comprising:

  • the pivot plate is formed by casting;

    the pivot plate extends to a position above the rear end portion of the mainframe so that a prescribed portion of the pivot plate faces an outer surface of the connecting tube;

    a recess formed in the prescribed portion of the pivot plate, said recess is formed for accommodating the outer surface of the connecting tube; and

    a rear shock absorber for supporting the rear swing arm, said rear shock absorber being mounted on the upper end portion of the pivot plate extending to a position above the mainframe.

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