Chapter 7
(Running Gear)
Motorcycle and Sidecar Frames
The frame is the principal bearing element of the motorcycle to
which all the units and assemblies of the motorcycle are attached.
The motorcycle is furnished with a twin closed frame of welded
construction. For the design features and principal members of the
motorcycle and the sidecar frames refer to Fig. 23.
The frame of the solo motorcycle differs from that shown in Fig. 23
in the absence of the sidecar fasteners and the parking brake
mechanism, availability of the side leg and welded on brackets for
fastening of the air pump.
The sidecar frame is coupled to the motorcycle frame through
collet clamp (Fig. 23, #10) and rear collet clamp bracket (Fig. 23,
#17) and two frame legs (Fig. 23, #9) and (Fig. 23, #15). The
brackets welded to the frame at the rear are used for mounting the
rubber members of the body suspension. The swinging arms are
connected to the frames by means of silent blocks. The vertical
stresses arising due to road bumps are cushioned by the spring
loaded hydraulic shock absorbers. The hinge joints of the shock
absorbers with the swinging arms and the frame are mounted on
rubber bushings.
