I understand these are Japanese bikes, and they tend to be a tad lighter than we are, but 150lbs? As a mature, adult male, the only way you should weigh 150lbs is if you have a tumor, or are 5'7" or less. I would suggest 180-200lbs would be the average for a male riding a 688lb bike in our fantastic country. I didn't include women, because it would hurt my fragile ego to see a female riding the bike that I treasure so...sexist? yes. Honest? yes. Go Irish!