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Yz250f running problem

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Hi there I am new to the forum, my names Aaron.

I have a 2005 yz250f and it's not running right. The problem that I am having is that it will either cut out or it revs real high while riding. It will cut out on low revs when slowing down as if I'm stalling it but then the other times it is fine on low speed and revs up in the high revs while riding. I need a bit of help on what to do with the carb? I've got the carb off and I've cleaned it out and cleaned the jets out. I just need a bit of help before I rebuild it and put it all back together. Maybe I need to jet the carb? Rebuild it? I just don't know. I was looking at the Boyesen quick shot do you think this would help me or would I be wasting my time?

All input would be much greatful thanks guys

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Confirm the throttle cables move freely and have a little play.

 

Buy a NEW pilot jet. Stop bother to clean it

 

Inspect the fuel screw and the spring/washer/oring. Reintall. Gently close, open to 1.75 turns. Get the bike hot, then fine adjust for a perfect idle.

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Should I buy a new jet kit or just the pilot jet? What size pilot jet should I get? I'm going to buy a fuel mixture screw to make it easier because it's got the standard screw at the moment. Should I buy a carb rebuild kit?

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