Supporting structure for rear parts of motorcycle

A motorcycle comprising:

• a motorcycle frame structure;
• a foot step for a passenger;
• a rear wheel shock absorber;
• an operation unit for manually adjusting a characteristic of the rear wheel shock absorber;
• a reservoir tank for rear wheel brake oil;
• and
• a step stay mounted to the motorcycle frame structure and configured to support the foot step, wherein
• the step stay comprises:
• a unit supporting portion configured to support the operation unit with the use of a first screw member;
• a tank supporting portion configured to support the reservoir tank with with the use of a second screw member;
• and
• a pannier supporting portion configured to support a front portion of a pannier for accommodating an article, the pannier supporting portion being engaged in a support reception portion defined at the front portion of the pannier thereby to support the front portion of the pannier when the pannier is mounted to a side portion of a motorcycle body,
• the pannier supporting portion is disposed rearward of the unit supporting portion, and
• an operation portion of the operation unit is disposed at a position at which overlap of the operation portion with the step stay and the pannier is avoided as viewed from an outer lateral side.