Hi I was riding my fourwheeler an shut it off then I had to move it so I pulled the pull cord 2 times and the 3 time I pulled an I couldn’t the motor locked up by I removed the spark plug and it was free as always then about 2 days later I went for a ride and was riding and noticed a horrible clunking noise from like the bottom of the motor it sounds like please help does it every time I ride fro about 15 mins

Here s the noise more at end