First, I am a BMX guy. So please excuse my ignorance when it comes to muscle bikes. I picked up 2 muscle bikes in a package deal the 1st is a Murray Wildcat with no serial #. The second is a F5 Ranger. The second as far as I can figure out through my searching seems to be made by Murray for the Ranger bicycle company. Any info would help, I love the knowledge. On the Wildcat, is it did am I looking in the wrong place for serial number? Do you think it's possible the dropout was replaced? Could it be a fake?