Patent ID: 7757801

Claim:
A rear swing arm installation structure for a vehicle body in which pivot bearing holes are coaxially drilled into a pair of vehicle frame member, an insertion hole of a rear swing arm is coaxially disposed between the pivot bearing holes, and the rear swing arm is pivotally supported between the pair of vehicle frame members via a pivot shaft inserted into the pivot bearing holes and the insertion hole, comprising: a cylindrical spacer into which the pivot shaft is inserted, said cylindrical spacer being screwed into one of the pivot bearing holes; the cylindrical spacer including a head section, a screw section, and a shaft section with an inner end, said screw section having a smaller diameter than the head section and a larger diameter than the shaft section; wherein the head section touches an end face of at least one of the pivot bearing holes on the outer side of one of the vehicle frame members; and the inner end of the shaft section directly touches an end face of a first collar member, and wherein the cylindrical spacer is a locknut and an adjustment bolt formed as a single piece for avoiding large tightening forces.