These are the bolts that connect the drive chain guard to the swingarm, and it is possible that they may loosen, which could cause the chain guard to contact the drive chain and break.
Since the Department of Transportation requires motorcycles to have a chain guard installed, this has lead to a recall for Yamaha MT-07 and Yamaha XSR700 owners.
To remedy the situation, Yamaha will notify affected owners, and Yamaha dealers will replace both chain guard mounting bolts, free of charge. This recall is expected to begin in August 2018.
Concerned owners may contact Yamaha customer service at 1-800-962-7926, and reference Yamaha’s number for this recall, which is 990120.
As always, the NHTSA is also available at 1-888-327-4236 and safercar.gov.