Motorcycle frame

A motorcycle frame comprising:

• a pair of frame tubes situated generally symmetrically about a longitudinal vertical plane located between the frame tubes, said tubes having parallel run portions arranged in a spaced apart relationship through a medial portion of the frame to define the bottom of a passenger compartment, said parallel run portions being laterally opposite one another and within a horizontal plane,
• a steering post generally centered within said vertical plane and ridigly connected to one end of the frame tubes for retaining a motorcycle front wheel fork,
• steering post support portions of said tubes extending forwardly from a first upwardly directed bend in said parallel run portions and inter-connecting the steering post with said parallel run portions, said steering post support portions extending rearwardly from the steering post and flaring laterally outwardly and downwardly therefrom,
• steering post brace means rigidly connected to the steering post and steering post support portions of each frame tube to reinforce the steering post relative to the frame,
• a first upper generally horizontal rearwardly projecting portion of each tube defining the top of an engine compartment at the rearwardmost part of the frame approximately at the height of the steering post, and a second lower generally horizontal portion of each tube located below and substantially parallel to each first generally horizontal portion to define the bottom of said engine compartment,
• said tubes each having an upwardly extending portion extending upwardly from a second bend in each of said frame tubes to define generally the rearward limit of the passenger compartment and interposed between its respective parallel run portion and the generally horizontal portion to complete the continuous length of said tubes from the steering post in the front rearwardly through the engine compartment, said upper horizontal portion of each tube being joined to its adjacent upwardly extending portion by a third bend in each frame tube, said third bend joining the axis of said upper horizontal portion, and
• at least one frame cross member laterally spanning the motorcycle frame rearwardly of the steering post support portions and fastened to each of said tubes.