My 2002 predator 90 bogs down and backfires when throttle is 1/2 to full. I've changed the fuel filter, checked the spark plug (beer bottle brown), and I have drained the fuel and oil tanks. When I remove the filter and spray carb cleaner in it it dies.

Any suggestions??

 

When its backfiring and bogging it means that there is water in the gas. You just have to change the gas.