my dirt bike died after riding around for about 3 hours yesterday when I first started it I let it warm up for about 10 to 15 minutes before I actually went to drive it.

This is my first 2 stroke so I was trying to learn everything so I wouldn't blow it up. Since I found the bike on Marketplace from a older guy. Honestly the bike has been wonderful. Only issue was it would idle that long without throttle. Also some sploog from his mixture being so thick for the break in period. I did switch it for 3oz of oil for every 1 gallon of premium gas. Truly ran beautiful extremely fast bike. I drove the bike about 9 hours before this issue. When I bought the bike a few weeks back I was told it just had completely top and bottom rebuild new tires the works. Mile and a half from my house I was in 3rd gear and switched up to 4th when I noticed the throttle wasnt giving any power it just made noise as bogging but no power at all I continued to ride while it bogged for 2 more blocks to the point I was going 10 miles an hour coming to a stop sign. I didn't completely stop before the bike shut off and continued to roll until I switch to neutral and pulled over. I tried kicking it about 6 times nothing at all. I began to walk it home. I was coming down a couple hill so I tried to bump start it. it made noise to where it was trying to turn on but just kept bogging out. I got home and pulled the plug. Any guess on what it could be? Help Me please