I have a 95 Rude vindicator 200. I'm running down the lake at about 5500 Rpm's and the carb spit like it backfired or something then about 2minutes later it went from 5500rpm's to 4000 and had a god awful knocking sound. yeah I know the motor is gone but does that sound like it threw a rod? I started it one more time just to hear and it fired right back up but man what a knocking sound. I know it'll be hard to say without hearing it so I'm just looking for some educated guesses here.