2006 Hawkeye sputters at full throtle. Take air boot and air cleaner off runs fine. put just air boot on it starts to sputter at full throtle. Not even the air cleaner just tube from carb to air clean

You need three things to make any gas engine run, in this order double check make sure you have proper timing set, spark and fuel. Could be bad gas or a bad ground from motor to frame.

Have you checked the Spark Plug ? No Spark & No Fuel means not going to start and run. If you are getting fuel then your Spark plug may need to be cleaned or replaced or even re-gaped. Spark plugs have a tendency to get fouled out. Meaning oil gets on it and it can not throw a good spark. If you do have a good spark then check the choke and or the float in the carb.

Thanks for allowing my in-put!

see this link... should fix the problem
02 03 Reverse OR

Make sure you have the CORRECT spark plug... use what the owners manual says... NGK..

. A non - resistor plug will make some motors sputter at high rpm's ...if the quad calls for a "R" plug..use one!

Check the air cleaner and any ductwork for blockage. (Mouse nest?)

Inspect the fuel system. If the fuel line is out of place and too close to the exhaust or cylinder head, the fuel may be boiling inside the line so you don't get proper flow to the carburetor (this is one possible cause of vapor lock).

Is the choke actuator part of the new carburetor? Verify that the choke is opening when the engine warms up. If it is an automatic choke, inspect the vacuum line and thermostat controlling it. Try removing the vacuum line from the choke actuator and plugging it when the engine is warmed up, then see if the engine keeps running. If it does, the actuator diaphragm leaks when the choke is open.

Check the exhaust pipe for blockage.

If the engine has an EGR system or PCV valve, check those for proper operation. If carbon deposits cause abnormal operation of the EGR valve, the engine will kill when the valve opens too much (about the time the engine is warmed up).

If everything else is good, check the exhaust manifold for blockage by carbon deposits.

clogged fuel filter or petcock

clean the filters on the petcock?

sounds like an air leak

Sounds like the carb,has it been check after its test and tune ?

Adjust the fuel idle and the accelerator cable.