idles but stalls with throttle

asking this question for a m8. he has a honda something or rather 400cc quad. it will idle fine but when he tries to apply the throttle it stalls.

any thoughts?

Check for air leaks and check the jetting.

air leaks?

will check the jets.

Yes, you may have an intake leak. Easiest way to check is to get a can of starting fluid and poke around the intake seals. If it bogs down and dies then you've found it.

If not, then check elsewhere.

dirty pilot jet

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