While riding around 75mph, my bike made a weird noise that I can't describe, and then the exhaust sound changed as well to a lighter, less aggressive sound. Like a put put type sound. (great adjectives right?). Throttle didn't do a thing anymore and the bike slowly came to a hault. Turned it off and tried to start it again, but nothing. The engine noise was gradually getting louder before it broke down. I also have an oil leak coming from the front left cylinder, if that helps at all. I don't want to bring it to a mechanic since its an older bike and not worth it to me what they would be charging. Any help is much appreciated.