NZcruzer

Hi everyone I am Caleb. I live in the Waikato region in NZ. I just got given a yamaha motorbike and I have no idea what it is. It needs some work so I was hoping I could get some help identifying. I took some photos and I would have attached them but the size limit is crazy. It has a 2500cm3 stamped on the motor and judging by a date on the I'd tag it's from 86. Any help would be awesome. Thanks!