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Vehicle body frame for motorcycle

  • US 20040154852A1
  • Filed: 04/05/2004
  • Published: 08/12/2004
  • Est. Priority Date: 12/28/2001
  • Status: Active Grant
First Claim
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1. A body frame for a motorcycle mounted with an engine unit and provided with a main frame by which a front fork and rear arms are supported, characterized in that the main frame comprises:

  • a head pipe unit which extends obliquely downward to a rear of a vehicle from a head pipe and so as to expand in a vertical direction;

    a down frame which is connected to a front part at lower end of the head pipe unit to extend downward and further extends to the rear of the vehicle; and

    rear arm brackets which are stretched and connected to a rear end of the down frame and a rear part at lower end of the head pipe unit, at least one of which is an aluminum die-cast molded product and the rest are aluminum forged molded products, or all of which are aluminum forged molded products.

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