Let my bike sit over the weekend (was running perfectly fine) get on it Monday and suddenly its sputtering. Changed the plugs, checked all connections, checked for any water (it got cleaned over the weekend), no water in carb bowls, no water in the tank. Doing a temp check the bike is only running on 3 cylinders.

If I turn the choke on full tilt it starts running fine on all 4 cylinders.

Any ideas?