Patent ID: 7419028
Filing Date: 2008-09-02
Classification: B62K,B62M

Abstract:
1. A motorcycle having a vehicle body supported by front and rear wheels, said vehicle body having a vehicle body centerline, said motorcycle also having an engine and a drive shaft, said drive shaft being offset from said vehicle body centerline, said engine having an engine output transmitted to the rear wheel by said drive shaft, said motorcycle comprising: a frame having a pair of pivot plates; and a swing arm mounted on the pivot plates so as to swing vertically, said rear wheel being mounted on a rear portion of said swing arm; wherein one of said pivot plates is on the drive shaft side of said vehicle body and is arranged closer to said vehicle body centerline than the drive shaft, said one of said pivot plates having a portion nearest said drive shaft and a remaining portion; wherein said portion nearest said drive shaft is flattened relative to said remaining portion; and wherein said frame includes a head pipe and a cross pipe extending between said pair of pivot plates, said cross pipe having a projecting portion on the drive shaft side of said one of said pivot plates on the drive shaft side, said cross pipe being positioned on a lower portion of said one of said pivot plates on the drive shaft side, said frame further including a down tube extending rearwardly from said head pipe and a lower pipe extending rearwardly from said down tube, said lower pipe connecting with said projecting portion of said cross pipe so that said lower pipe is arranged offset from said vehicle body centerline farther than said one of said pivot plates having a portion nearest said drive shaft.