YX140 engine with pz30 carb only starts with choke on

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Braap 140r

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I have a yx140 engine, iv replaced the head and installed a z40 cam, done a top end . Timing and valve clearances are intake .004 exhaust .006
I have a pz30 carb with stock jets 100 and 20,
I have the fuel screw 1.5 turns out and on the 4th clip.
bike will only kick over with the choke on.
Any ideas why cheers
 
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