Gz250 gasoline fills the Air filter

[bo_TxGzGuy]

I finally got my bike running.

I had the engine replaced last year, the old one was hard to start.

The guy took a long time fixing it, so I didn't get it back until the summer was over and the first cold front came in. It was too cold for me to ride until spring. Then I found the choke cable was frozen. It took two attempts to get the right part, now it was June. I started her up she ran great I took a ride around a few blocks. She ran great I was happy.

Today I went to go for a ride she started, but ran rough, then I saw fuel pouring out just above the chain. I removed the air filter, It was full of gasoline. I siphoned out and poured out the gas until the canister was empty and started her up. Gasoline was being pumped into the air filter canister through a hose from the crank case.

What could the problem be? Bad rings? blown gasket?